PCMCIA: add Kconfig control for building sa11xx_base.c

sa11xx_base.c is currently built when either PCMCIA_SA1100 or
PCMCIA_SA1111 are selected.  Let's move the logic into Kconfig.
Acked-by: Dominik Brodowski <linux@dominikbrodowski.net>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

drivers/pcmcia/Kconfig

@@ -183,10 +183,14 @@ config PCMCIA_BCM63XX
 config PCMCIA_SOC_COMMON
 	tristate
 
+config PCMCIA_SA11XX_BASE
+	tristate
+
 config PCMCIA_SA1100
 	tristate "SA1100 support"
 	depends on ARM && ARCH_SA1100 && PCMCIA
 	select PCMCIA_SOC_COMMON
+	select PCMCIA_SA11XX_BASE
 	help
 	  Say Y here to include support for SA11x0-based PCMCIA or CF
 	  sockets, found on HP iPAQs, Yopy, and other StrongARM(R)/
@@ -198,6 +202,7 @@ config PCMCIA_SA1111
 	tristate "SA1111 support"
 	depends on ARM && ARCH_SA1100 && SA1111 && PCMCIA
 	select PCMCIA_SOC_COMMON
+	select PCMCIA_SA11XX_BASE
 	help
 	  Say Y  here to include support for SA1111-based PCMCIA or CF
 	  sockets, found on the Jornada 720, Graphicsmaster and other

drivers/pcmcia/Makefile

@@ -25,8 +25,9 @@ obj-$(CONFIG_I82092)				+= i82092.o
 obj-$(CONFIG_TCIC)				+= tcic.o
 obj-$(CONFIG_PCMCIA_M8XX)			+= m8xx_pcmcia.o
 obj-$(CONFIG_PCMCIA_SOC_COMMON)			+= soc_common.o
-obj-$(CONFIG_PCMCIA_SA1100)			+= sa11xx_base.o sa1100_cs.o
-obj-$(CONFIG_PCMCIA_SA1111)			+= sa11xx_base.o sa1111_cs.o
+obj-$(CONFIG_PCMCIA_SA11XX_BASE)		+= sa11xx_base.o
+obj-$(CONFIG_PCMCIA_SA1100)			+= sa1100_cs.o
+obj-$(CONFIG_PCMCIA_SA1111)			+= sa1111_cs.o
 obj-$(CONFIG_M32R_PCC)				+= m32r_pcc.o
 obj-$(CONFIG_M32R_CFC)				+= m32r_cfc.o
 obj-$(CONFIG_PCMCIA_BCM63XX)			+= bcm63xx_pcmcia.o