Revert "Revert "Makefile: add -mno-unaligned-access to fix boot on cr…

…espo""

* This reverts commit bef69c5.
* that revert made kernel unbootable again when
  toolchain-layer/recipes-devtools/gcc/gcc-4.6/linaro/gcc-4.6-linaro-r106827.patch
  was used and because toolchain-layer is enabled in SHR makefile then
  we should assume that gcc-4.6-linaro-r106827.patch and
  -munaligned-access is enabled by default for armv7a

Makefile

@@ -368,7 +368,8 @@ KBUILD_CFLAGS   := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
 		   -fno-strict-aliasing -fno-common \
 		   -Werror-implicit-function-declaration \
 		   -Wno-format-security \
-		   -fno-delete-null-pointer-checks
+		   -fno-delete-null-pointer-checks \
+		   -mno-unaligned-access
 KBUILD_AFLAGS_KERNEL :=
 KBUILD_CFLAGS_KERNEL :=
 KBUILD_AFLAGS   := -D__ASSEMBLY__