efi_loader: allow unaligned memory access

The UEFI spec mandates that unaligned memory access should be enabled if
supported by the CPU architecture.

This patch adds an empty weak function unaligned_access() that can be
overridden by an architecture specific routine.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Signed-off-by: Alexander Graf <agraf@suse.de>

include/asm-generic/unaligned.h

@@ -20,4 +20,7 @@
 #error invalid endian
 #endif
 
+/* Allow unaligned memory access */
+void allow_unaligned(void);
+
 #endif