[PATCH] ARM: fix mach-at91 build breakage

The rename of the AT91 subtree from mach-at91rm9200 to mach-at91
(to accomodate at91sam926x processors) was incomplete.  It needs
this patch to be able to build again.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/arch/arm/Makefile b/arch/arm/Makefile
index 1320418..ab9f2d4 100644
--- a/arch/arm/Makefile
+++ b/arch/arm/Makefile
@@ -124,7 +124,7 @@
  machine-$(CONFIG_ARCH_H720X)	   := h720x
  machine-$(CONFIG_ARCH_AAEC2000)   := aaec2000
  machine-$(CONFIG_ARCH_REALVIEW)   := realview
- machine-$(CONFIG_ARCH_AT91)	   := at91rm9200
+ machine-$(CONFIG_ARCH_AT91)	   := at91
  machine-$(CONFIG_ARCH_EP93XX)	   := ep93xx
  machine-$(CONFIG_ARCH_PNX4008)	   := pnx4008
  machine-$(CONFIG_ARCH_NETX)	   := netx