internal: Only build on x86 and mipsel

internal_init() explicitly fails on everything but x86 and mipsel.
Instead, we can just never build the internal programmer on other
architectures and drop a lot of #if boilerplate.

Change-Id: I672ddab0415df3baa49ff39a1c9db1b41d8143a4
Signed-off-by: Nico Huber <nico.h@gmx.de>
Reviewed-on: https://review.coreboot.org/22671
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: David Hendricks <david.hendricks@gmail.com>
Reviewed-by: Patrick Rudolph <siro@das-labor.org>
diff --git a/Makefile b/Makefile
index bd2cc10..a97761f 100644
--- a/Makefile
+++ b/Makefile
@@ -378,6 +378,15 @@
 override ARCH := $(strip $(call debug_shell,$(CC) $(CPPFLAGS) -E archtest.c 2>/dev/null | grep -v '^\#' | grep '"' | cut -f 2 -d'"'))
 override ENDIAN := $(strip $(call debug_shell,$(CC) $(CPPFLAGS) -E endiantest.c 2>/dev/null | grep -v '^\#'))
 
+# Disable the internal programmer on unsupported architectures (everything but x86 and mipsel)
+ifneq ($(ARCH)-little, $(filter $(ARCH),x86 mips)-$(ENDIAN))
+ifeq ($(CONFIG_INTERNAL), yes)
+UNSUPPORTED_FEATURES += CONFIG_INTERNAL=yes
+else
+override CONFIG_INTERNAL = no
+endif
+endif
+
 # PCI port I/O support is unimplemented on PPC/MIPS/SPARC and unavailable on ARM.
 # Right now this means the drivers below only work on x86.
 ifneq ($(ARCH), x86)
@@ -422,11 +431,6 @@
 # architectures with unknown raw access properties.
 # Right now those architectures are alpha hppa m68k sh s390
 ifneq ($(ARCH),$(filter $(ARCH),x86 mips ppc arm sparc))
-ifeq ($(CONFIG_INTERNAL), yes)
-UNSUPPORTED_FEATURES += CONFIG_INTERNAL=yes
-else
-override CONFIG_INTERNAL = no
-endif
 ifeq ($(CONFIG_RAYER_SPI), yes)
 UNSUPPORTED_FEATURES += CONFIG_RAYER_SPI=yes
 else