From Kernel commit 418df63a ARM: 7670/1: fix the memset fix

| Commit 455bd4c430b0 ("ARM: 7668/1: fix memset-related crashes caused by
| recent GCC (4.7.2) optimizations") attempted to fix a compliance issue
| with the memset return value.  However the memset itself became broken
| by that patch for misaligned pointers.
|
| This fixes the above by branching over the entry code from the
| misaligned fixup code to avoid reloading the original pointer.
|
| Also, because the function entry alignment is wrong in the Thumb mode
| compilation, that fixup code is moved to the end.
|
| While at it, the entry instructions are slightly reworked to help dual
| issue pipelines.
|
| Signed-off-by: Nicolas Pitre <nico@linaro.org>
| Tested-by: Alexander Holler <holler@ahsoftware.de>
| Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>