northbridge/intel/gm45/bootblock.c: Remove repeated word

Change-Id: Ie3bfdb27aa7c981a500e82b6a6958576e0048bcd
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/49532
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Jacob Garber <jgarber1@ualberta.ca>

src/northbridge/intel/gm45/bootblock.c

@@ -12,7 +12,7 @@ void bootblock_early_northbridge_init(void)
 	/*
 	 * The "io" variant of the config access is explicitly used to
 	 * setup the PCIEXBAR because CONFIG(MMCONF_SUPPORT) is set to
-	 * to true. That way all subsequent non-explicit config accesses use
+	 * true. That way all subsequent non-explicit config accesses use
 	 * MCFG. This code also assumes that bootblock_northbridge_init() is
 	 * the first thing called in the non-asm boot block code. The final
 	 * assumption is that no assembly code is using the