ASM: word-at-a-time: make the interfaces truly generic
(Chad Goodman)

Signed-off-by: poondog <markj338@gmail.com>
LIB: use generic strnlen_user and strncpy_from_user functions
(Chad Goodman)

Conflicts:
	arch/arm/Kconfig

Conflicts:
	arch/arm/Kconfig
	arch/arm/lib/Makefile
ARM: dcache: select DCACHE_WORD_ACCESS for little-endian ARMv6+ CPUs
(Chad Goodman)

Signed-off-by: poondog <markj338@gmail.com>
ARM: 7927/1: dcache: select DCACHE_WORD_ACCESS for big-endian CPUs

With commit 11ec50caedb5 ("word-at-a-time: provide generic big-endian
zero_bytemask implementation"), the asm-generic word-at-a-time code now
provides a zero_bytemask implementation, allowing us to make use of
DCACHE_WORD_ACCESS on big-endian CPUs, providing our
load_unaligned_zeropad function is endianness-clean.

This patch reworks the load_unaligned_zeropad fixup code to work for
both big- and little-endian CPUs, then removes the !CPU_BIG_ENDIAN check
when selecting DCACHE_WORD_ACCESS.

Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
defconfig: add GENERIC_STRNCPY_FROM_USER and GENERIC_STRNLEN_USER
defconfig: add DCACHE_WORD_ACCESS