arm: Remove -fno-strict-aliasing

-fno-strict-aliasing is hidding warnings.

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
diff --git a/cpu/arm720t/config.mk b/cpu/arm720t/config.mk
index 74d5283..3844c62 100644
--- a/cpu/arm720t/config.mk
+++ b/cpu/arm720t/config.mk
@@ -22,8 +22,7 @@
 # MA 02111-1307 USA
 #
 
-PLATFORM_RELFLAGS += -fno-strict-aliasing  -fno-common -ffixed-r8 \
-	-msoft-float
+PLATFORM_RELFLAGS +=  -fno-common -ffixed-r8 -msoft-float
 
 PLATFORM_CPPFLAGS += -march=armv4 -mtune=arm7tdmi
 # =========================================================================