amd/mtrr: Fix IORR MTRR

IORR MTRR definitions renamed to avoid collision
between <cpu/amd/mtrr.h> and <AGESA.h>.

Change-Id: I3eeb0c69bbb76039039dc90683670cafcb00ed36
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/29352
Reviewed-by: Richard Spiegel <richard.spiegel@silverbackltd.com>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/cpu/amd/mtrr/amd_mtrr.c

@@ -138,7 +138,7 @@ void amd_setup_mtrrs(void)
 	 * undefined side effects.
 	 */
 	msr.lo = msr.hi = 0;
-	for (i = IORR_FIRST; i <= IORR_LAST; i++)
+	for (i = MTRR_IORR0_BASE; i <= MTRR_IORR1_MASK; i++)
 		wrmsr(i, msr);
 
 	/* Enable Variable Mtrrs