fix(build): convert tabs to spaces

Convert any used tabs in arch_features.mk to spaces to avoid makefile
build issues. Only recipes should be indented with tabs.

ENABLE_TRBE_FOR_NS should be enabled only for aarch64 but accidentally
its enabled for aarch32 as well in FVP makefile.

Change-Id: Iee913a04d6b60a4738183a17421754c2638e8e6d
Signed-off-by: Govindraj Raja <govindraj.raja@arm.com>
diff --git a/plat/arm/board/fvp/platform.mk b/plat/arm/board/fvp/platform.mk
index 72f94b0..8296c38 100644
--- a/plat/arm/board/fvp/platform.mk
+++ b/plat/arm/board/fvp/platform.mk
@@ -75,8 +75,8 @@
 ifeq (${ENABLE_RME},0)
 	ENABLE_BRBE_FOR_NS		:= 2
 endif
+    ENABLE_TRBE_FOR_NS		:= 2
 endif
-ENABLE_TRBE_FOR_NS		:= 2
 ENABLE_SYS_REG_TRACE_FOR_NS	:= 2
 ENABLE_FEAT_CSV2_2		:= 2
 ENABLE_FEAT_DIT			:= 2