nb/i945: Drop CHANNEL_XOR_RANDOMIZATION selection

CHANNEL_XOR_RANDOMIZATION is configurable for no reason.

Change-Id: I31e6ed6cb040dcba756cbfd2247d90753d372915
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/32928
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Nico Huber <nico.h@gmx.de>

src/northbridge/intel/i945/Kconfig

@@ -56,10 +56,6 @@ config I945_LVDS
 	  for the LVDS port. A linear framebuffer is only supported for
 	  LVDS.
 
-config CHANNEL_XOR_RANDOMIZATION
-	bool
-	default n
-
 config MMCONF_BASE_ADDRESS
 	hex
 	default 0xf0000000

src/northbridge/intel/i945/raminit.c

@@ -2112,12 +2112,8 @@ static void sdram_post_jedec_initialization(struct sys_info *sysinfo)
 	if (sysinfo->interleaved) {
 
 		reg32 = MCHBAR32(DCC);
-#if CONFIG(CHANNEL_XOR_RANDOMIZATION)
 		reg32 &= ~(1 << 10);
 		reg32 |= (1 << 9);
-#else
-		reg32 &= ~(1 << 9);
-#endif
 		MCHBAR32(DCC) = reg32;
 	}