powerpc/85xx: Drop CONFIG_VIDEO on P1_P2_RDB-PC boards to reduce size

With older compilers (gcc-4.2.x) we run into issues that resulting image
is too large.  We can save a bunch of space by removing the video support.
In general video support on these boards is a nice to have since it
requires a PCIe add-on card.
Signed-off-by: NKumar Gala <galak@kernel.crashing.org>

include/configs/p1_p2_rdb_pc.h

@@ -630,22 +630,6 @@
 #endif
 #define CONFIG_SYS_PCIE1_IO_SIZE	0x00010000	/* 64k */
 
-
-/*PCIE video card used*/
-#define VIDEO_IO_OFFSET		CONFIG_SYS_PCIE2_IO_VIRT
-
-/* video */
-#define CONFIG_VIDEO
-#ifdef CONFIG_VIDEO
-#define CONFIG_BIOSEMU
-#define CONFIG_CFB_CONSOLE
-#define CONFIG_VIDEO_SW_CURSOR
-#define CONFIG_VGA_AS_SINGLE_DEVICE
-#define CONFIG_ATI_RADEON_FB
-#define CONFIG_VIDEO_LOGO
-#define CONFIG_SYS_ISA_IO_BASE_ADDRESS	VIDEO_IO_OFFSET
-#endif
-
 #define CONFIG_NET_MULTI
 #define CONFIG_PCI_PNP	/* do pci plug-and-play */
 #define CONFIG_E1000	/* Defind e1000 pci Ethernet card*/