siemens: pxm2: disable video after DM_VIDEO conversion deadline

The board was not converted to DM_VIDEO before deadline, so disable
video support for now.
Signed-off-by: NAnatolij Gustschin <agust@denx.de>

configs/pxm2_defconfig

@@ -101,10 +101,10 @@ CONFIG_USB_GADGET_PRODUCT_NUM=0x02d2
 CONFIG_USB_GADGET_DOWNLOAD=y
 CONFIG_USB_ETHER=y
 CONFIG_USBNET_HOST_ADDR="de:ad:be:af:00:00"
-CONFIG_VIDEO=y
+# CONFIG_VIDEO is not set
 # CONFIG_VIDEO_SW_CURSOR is not set
 CONFIG_SYS_CONSOLE_BG_COL=0xff
 CONFIG_SYS_CONSOLE_FG_COL=0x00
 CONFIG_SPLASH_SCREEN=y
 CONFIG_SPLASH_SCREEN_ALIGN=y
-CONFIG_VIDEO_BMP_RLE8=y
+# CONFIG_VIDEO_BMP_RLE8 is not set