arm/imx/iomux-v1: rename source file and reorganize Kconfig stuff

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
diff --git a/arch/arm/plat-mxc/Makefile b/arch/arm/plat-mxc/Makefile
index 4074c18..41d3176 100644
--- a/arch/arm/plat-mxc/Makefile
+++ b/arch/arm/plat-mxc/Makefile
@@ -5,9 +5,10 @@
 # Common support
 obj-y := irq.o clock.o gpio.o time.o devices.o cpu.o system.o
 
-obj-$(CONFIG_ARCH_MX1) += iomux-mx1-mx2.o dma-mx1-mx2.o
-obj-$(CONFIG_ARCH_MX2) += iomux-mx1-mx2.o dma-mx1-mx2.o
-CFLAGS_iomux-mx1-mx2.o = -DIMX_NEEDS_DEPRECATED_SYMBOLS
+obj-$(CONFIG_ARCH_MX1) += dma-mx1-mx2.o
+obj-$(CONFIG_ARCH_MX2) += dma-mx1-mx2.o
+obj-$(CONFIG_IMX_HAVE_IOMUX_V1) += iomux-v1.o
+CFLAGS_iomux-v1.o = -DIMX_NEEDS_DEPRECATED_SYMBOLS
 obj-$(CONFIG_ARCH_MXC_IOMUX_V3) += iomux-v3.o
 obj-$(CONFIG_MXC_PWM)  += pwm.o
 obj-$(CONFIG_USB_EHCI_MXC) += ehci.o