arm: armada-xp: Move SoC headers to mach-mvebu/include/mach

Move arch/arm/include/asm/arch-armada-xp/*
     -> arch/arm/mach-mvebu/include/mach/*

Additionally the SYS_SOC is renamed from "armada-xp" to "mvebu". With this
change all these files can better be shared with other, newer Mavell
MVEBU SoC's. Like the upcoming Armada 38x support.

Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Masahiro Yamada <yamada.masahiro@socionext.com>
Tested-by: Kevin Smith <kevin.smith@elecsyscorp.com>
Tested-by: Dirk Eibach <dirk.eibach@gdsys.cc>
diff --git a/board/Marvell/db-mv784mp-gp/Kconfig b/board/Marvell/db-mv784mp-gp/Kconfig
index 98aa10a..d0b426e 100644
--- a/board/Marvell/db-mv784mp-gp/Kconfig
+++ b/board/Marvell/db-mv784mp-gp/Kconfig
@@ -7,7 +7,7 @@
 	default "Marvell"
 
 config SYS_SOC
-	default "armada-xp"
+	default "mvebu"
 
 config SYS_CONFIG_NAME
 	default "db-mv784mp-gp"