microblaze: Convert headers to SPDX license

Covert all headers to SPDX.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Reviewed-by: Stefan Asserhall <stefan.asserhall@xilinx.com>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>

microblaze: Change extern inline to static inline

With compilers which follow the C99 standard (like modern versions of gcc and
clang), "extern inline" does the opposite thing from older versions of gcc
(emits code for an externally linkable version of the inline function).

"static inline" does the intended behavior in all cases instead.

Description taken from:
"staging, rtl8192e, LLVMLinux: Change extern inline to static inline"
(sha1: 6d91857d4826b382b3fd4fad95f52713be646f96)

The patch removes compilation warnings W=1:
./arch/microblaze/include/asm/delay.h:18:20: warning: no previous
prototype for '__delay' [-Wmissing-prototypes]
extern inline void __delay(unsigned long loops)
./arch/microblaze/include/asm/delay.h:46:20: warning: no previous
prototype for '__udelay' [-Wmissing-prototypes]
extern inline void __udelay(unsigned int x)
./arch/microblaze/include/asm/pgalloc.h:63:22: warning: no previous
prototype for 'get_pgd_slow' [-Wmissing-prototypes]
extern inline pgd_t *get_pgd_slow(void)
./arch/microblaze/include/asm/pgalloc.h:73:22: warning: no previous
prototype for 'get_pgd_fast' [-Wmissing-prototypes]
extern inline pgd_t *get_pgd_fast(void)
./arch/microblaze/include/asm/pgalloc.h:87:20: warning: no previous
prototype for 'free_pgd_fast' [-Wmissing-prototypes]
extern inline void free_pgd_fast(pgd_t *pgd)
./arch/microblaze/include/asm/pgalloc.h:94:20: warning: no previous
prototype for 'free_pgd_slow' [-Wmissing-prototypes]
extern inline void free_pgd_slow(pgd_t *pgd)
./arch/microblaze/include/asm/pgalloc.h:149:20: warning: no previous
prototype for 'pte_free_fast' [-Wmissing-prototypes]
extern inline void pte_free_fast(pte_t *pte)
./arch/microblaze/include/asm/pgalloc.h:156:20: warning: no previous
prototype for 'pte_free_kernel' [-Wmissing-prototypes]
extern inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
./arch/microblaze/include/asm/pgalloc.h:161:20: warning: no previous
prototype for 'pte_free_slow' [-Wmissing-prototypes]
extern inline void pte_free_slow(struct page *ptepage)

Signed-off-by: Michal Simek <michal.simek@xilinx.com>

microblaze: delay.h fix udelay and ndelay for 8 bit args

Based on:
"asm-generic: delay.h fix udelay and ndelay for 8 bit args"
(sha1: a87e553fabe8ceadc6f90889066559234cf194c7)

Signed-off-by: Michal Simek <michal.simek@xilinx.com>

microblaze: Fix missing HZ macro

Add missing param.h header because of HZ macro.
It is causing compilation failure:
In file included from include/linux/delay.h:14:0,
from drivers/clk/qcom/reset.c:18:
drivers/clk/qcom/reset.c: In function 'qcom_reset':
arch/microblaze/include/asm/delay.h:39:35: error: 'HZ'
undeclared (first use in this function)

Signed-off-by: Michal Simek <michal.simek@xilinx.com>

microblaze_v8: delay.h, timex.h

Reviewed-by: Ingo Molnar <mingo@elte.hu>
Acked-by: Stephen Neuendorffer <stephen.neuendorffer@xilinx.com>
Acked-by: John Linn <john.linn@xilinx.com>
Acked-by: John Williams <john.williams@petalogix.com>
Signed-off-by: Michal Simek <monstr@monstr.eu>