cpu/x86/mtrr/earlymtrr.c: Remove repeated word

Change-Id: I7e7570ff6a4319a0cf583ae5b76e7c24f0241509
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/49510
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Jacob Garber <jgarber1@ualberta.ca>

src/cpu/x86/mtrr/earlymtrr.c

@@ -32,7 +32,7 @@ void set_var_mtrr(
 	unsigned int reg, unsigned int base, unsigned int size,
 	unsigned int type)
 {
-	/* Bit Bit 32-35 of MTRRphysMask should be set to 1 */
+	/* Bit 32-35 of MTRRphysMask should be set to 1 */
 	/* FIXME: It only support 4G less range */
 	msr_t basem, maskm;