video: imx: Fix Makefile in order to be able to add other imx drivers

The IPUv3 is one IP part of the imx world, there are others, and
selecting the whole imx/ folder based on such a specific Kconfig symbol
is sub-optimal. Let's always enter the imx/ folder, and then selectively
compile parts of the folder based on the configuration.

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>

drivers/video/Makefile

@@ -53,7 +53,7 @@ obj-$(CONFIG_VIDEO_COREBOOT) += coreboot.o
 obj-$(CONFIG_VIDEO_DW_HDMI) += dw_hdmi.o
 obj-$(CONFIG_VIDEO_DW_MIPI_DSI) += dw_mipi_dsi.o
 obj-$(CONFIG_VIDEO_EFI) += efi.o
-obj-$(CONFIG_VIDEO_IPUV3) += imx/
+obj-y += imx/
 obj-$(CONFIG_VIDEO_IVYBRIDGE_IGD) += ivybridge_igd.o
 obj-$(CONFIG_VIDEO_LCD_ANX9804) += anx9804.o
 obj-$(CONFIG_VIDEO_LCD_ENDEAVORU) += endeavoru-panel.o

drivers/video/imx/Makefile

@@ -3,4 +3,4 @@
 # (C) Copyright 2000-2007
 # Wolfgang Denk, DENX Software Engineering, wd@denx.de.
 
-obj-y += mxc_ipuv3_fb.o ipu_common.o ipu_disp.o
+obj-$(CONFIG_VIDEO_IPUV3) += mxc_ipuv3_fb.o ipu_common.o ipu_disp.o