at91: move arch-at91sam9 to arch-at91

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
diff --git a/cpu/arm926ejs/at91/config.mk b/cpu/arm926ejs/at91/config.mk
new file mode 100644
index 0000000..31491a8
--- /dev/null
+++ b/cpu/arm926ejs/at91/config.mk
@@ -0,0 +1,3 @@
+PLATFORM_CPPFLAGS += -march=armv5te
+PLATFORM_CPPFLAGS += $(call cc-option,-mtune=arm926ejs,)
+LDSCRIPT := $(SRCTREE)/cpu/arm926ejs/at91/u-boot.lds