arm: Fix linking errors with binutils 2.23

We end up with linking errors on arm using latest binutils
because we are linking asm generated objects which use -march=all
generating different attributes into object and use some c objects
e.g. misc.o which use different march therefore generating a
different set of attributes into object. When linking is done
the ld complains since it finds incompatible attributes and ends
up with errors like

error: DIV usage mismatch between arch/arm/boot/compressed/head.o and
output
error: DIV usage mismatch between arch/arm/boot/compressed/misc.o and
output
error: DIV usage mismatch between arch/arm/boot/compressed/decompress.o
and output
error: DIV usage mismatch between arch/arm/boot/compressed/lib1funcs.o
and output

This patch fixes it by providing correct march to assembly routines
which than matches with output of ld.

Signed-off-by: Khem Raj <raj.khem at gmail.com>

Conflicts:
	arch/arm/boot/compressed/Makefile

Change-Id: Id0402ee9147814828ae7a053a56049ae8a799e12