rpi3: Remove broken support of RESET_TO_BL31

There is no way to boot BL31 at the addresses specified in the platform
memory map unless an extra loader is used at address 0x00000000. It is
better to remove it to prevent confusion. Having it enabled was a bug.

Change-Id: I3229fbc080f5996cff47efce8e799bae94e0d5cb
Signed-off-by: Antonio Nino Diaz <antonio.ninodiaz@arm.com>
diff --git a/plat/rpi3/platform.mk b/plat/rpi3/platform.mk
index 5990f27..3ad7114 100644
--- a/plat/rpi3/platform.mk
+++ b/plat/rpi3/platform.mk
@@ -90,8 +90,8 @@
 # Disable the PSCI platform compatibility layer by default
 ENABLE_PLAT_COMPAT		:= 0
 
-# Enable reset to BL31 by default
-RESET_TO_BL31			:= 1
+# Reset to BL31 isn't supported
+RESET_TO_BL31			:= 0
 
 # Have different sections for code and rodata
 SEPARATE_CODE_AND_RODATA	:= 1
@@ -138,6 +138,10 @@
   $(error Error: rpi3 needs MULTI_CONSOLE_API=1)
 endif
 
+ifneq (${RESET_TO_BL31}, 0)
+  $(error Error: rpi3 needs RESET_TO_BL31=0)
+endif
+
 ifeq (${ARCH},aarch32)
   $(error Error: AArch32 not supported on rpi3)
 endif