Copy stable/10@r272459 to releng/10.1 as part of
the 10.1-RELEASE process.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

MFC r258779,r258780,r258787,r258822:

Fix undefined behavior: (1 << 31) is not defined as 1 is an int and this
shifts into the sign bit. Instead use (1U << 31) which gets the
expected result.

Similar to the (1 << 31) case it is not defined to do (2 << 30).

This fix is not ideal as it assumes a 32 bit int, but does fix the issue
for most cases.

A similar change was made in OpenBSD.

Copy head (r256279) to stable/10 as part of the 10.0-RELEASE cycle.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Netlogic XLP network driver update

Changes are to
- update board and network interface detection logic
- fix reading onboard CPLD in little-endian config
- print NAE frequency conrrectly for Bx chips
- update XAUI config to disable Rx/Tx until interface is up

Submitted by: Venkatesh J V <venkatesh.vivekanandan@broadcom.com>

Fix incorrect KASSERTs in xlpge

Fix for crash in Netlogic XLP network accelerator driver when invariants
are enabled - use correct the condition for KASSERT.

Little-endian and other fixes for Broadcom XLP network driver

The changes are:
- the microcore code loaded into the NAE has to be byteswapped
in LE
- the descriptors in memory for a P2P NAE descriptor has to be
byteswapped in LE
- the m_data pointer is already cacheline aligned, so the
unnecessary m_adj to cacheline size can be removed
- fix mask used to obtain physical address from the Tx freeback
descriptor
- fix a compile error in code under #ifdef

Obtained from: Venkatesh J V <venkatesh.vivekanandan@broadcom.com>

Broadcom XLP network driver update for XLP 8xx B1 rev

Update MDIO reset code to support Broadcom XLP B1 revisions.
Update nlm_xlpge_ioctl, nlm_xlpge_port_enable need not be
called after nlm_xlpge_init.

Obtained from: Venkatesh J V <venkatesh.vivekanandan@broadcom.com>

Minor updates to the Broadcom XLP NAE driver

Remove unnecessary SGMII initialization code from nae.c. While there
clean up some prints and whitespace.

Mechanically substitute flags from historic mbuf allocator with
malloc(9) flags within sys.

Exceptions:

- sys/contrib not touched
- sys/mbuf.h edited manually

Support Netlogic XLP 8xx B1 revisions in xlpge.

Updates to the MDIO access code for the new revision of the
XLP chip.

Remove unnecessary assembly code.

The compiler should generate lw/sw corresponding to register
operations.

Fix little-endian built.

xlpge : driver for XLP network accelerator

Features:
- network driver for the four 10G interfaces and two management ports
on XLP 8xx.
- Support 4xx and 3xx variants of the processor.
- Source code and firmware building for the 16 mips32r2 micro-code engines
in the Network Accelerator.
- Basic initialization code for Packet ordering Engine.

Submitted by: Prabhath Raman (prabhath at netlogicmicro com)
[refactored and fixed up for style by jchandra]