ARM: at91: collect SoC sources into mach-at91

This commit moves source files as follows:

  arch/arm/cpu/arm920t/at91/*   -> arch/arm/mach-at91/arm920t/*
  arch/arm/cpu/arm926ejs/at91/* -> arch/arm/mach-at91/arm926ejs/*
  arch/arm/cpu/armv7/at91/*     -> arch/arm/mach-at91/armv7/*
  arch/arm/cpu/at91-common/*    -> arch/arm/mach-at91/*

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Acked-by: Andreas Bießmann <andreas.devel@googlemail.co>
diff --git a/arch/arm/mach-at91/Makefile b/arch/arm/mach-at91/Makefile
new file mode 100644
index 0000000..e596ba6
--- /dev/null
+++ b/arch/arm/mach-at91/Makefile
@@ -0,0 +1,12 @@
+obj-$(CONFIG_AT91_WANTS_COMMON_PHY) += phy.o
+ifneq ($(CONFIG_SPL_BUILD),)
+obj-$(CONFIG_AT91SAM9G20) += sdram.o spl_at91.o
+obj-$(CONFIG_AT91SAM9M10G45) += mpddrc.o spl_at91.o
+obj-$(CONFIG_SAMA5D3) += mpddrc.o spl_atmel.o
+obj-$(CONFIG_SAMA5D4) += mpddrc.o spl_atmel.o
+obj-y += spl.o
+endif
+
+obj-$(CONFIG_CPU_ARM920T)	+= arm920t/
+obj-$(CONFIG_CPU_ARM926EJS)	+= arm926ejs/
+obj-$(CONFIG_CPU_V7)		+= armv7/