ARM: shmobile: mackerel: Remove Legacy C board code

Remove legacy C code for the sh7372 Mackerel board. There is no
DT multiplatform implementation available for the sh7372 SoC so
simply phase out the board and SoC code support.
Signed-off-by: Magnus Damm <damm+renesas@opensource.se>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

arch/arm/mach-shmobile/Kconfig

@@ -154,15 +154,6 @@ config MACH_APE6EVM_REFERENCE
 
 	   This is intended to aid developers
 
-config MACH_MACKEREL
-	bool "mackerel board"
-	depends on ARCH_SH7372
-	select ARCH_REQUIRE_GPIOLIB
-	select REGULATOR_FIXED_VOLTAGE if REGULATOR
-	select SMSC_PHY if SMSC911X
-	select SND_SOC_AK4642 if SND_SIMPLE_CARD
-	select USE_OF
-
 config MACH_ARMADILLO800EVA
 	bool "Armadillo-800 EVA board"
 	depends on ARCH_R8A7740

arch/arm/mach-shmobile/Makefile

@@ -60,7 +60,6 @@ obj-$(CONFIG_MACH_MARZEN)	+= board-marzen-reference.o
 else
 obj-$(CONFIG_MACH_APE6EVM)	+= board-ape6evm.o
 obj-$(CONFIG_MACH_APE6EVM_REFERENCE)	+= board-ape6evm-reference.o
-obj-$(CONFIG_MACH_MACKEREL)	+= board-mackerel.o
 obj-$(CONFIG_MACH_BOCKW)	+= board-bockw.o
 obj-$(CONFIG_MACH_BOCKW_REFERENCE)	+= board-bockw-reference.o
 obj-$(CONFIG_MACH_MARZEN)	+= board-marzen.o

arch/arm/mach-shmobile/Makefile.boot

@@ -7,7 +7,6 @@ loadaddr-$(CONFIG_MACH_BOCKW) += 0x60008000
 loadaddr-$(CONFIG_MACH_BOCKW_REFERENCE) += 0x60008000
 loadaddr-$(CONFIG_MACH_KZM9G) += 0x41008000
 loadaddr-$(CONFIG_MACH_KZM9G_REFERENCE) += 0x41008000
-loadaddr-$(CONFIG_MACH_MACKEREL) += 0x40008000
 loadaddr-$(CONFIG_MACH_MARZEN) += 0x60008000
 
 __ZRELADDR	:= $(sort $(loadaddr-y))