[CPUFREQ] Explicitly disable scaling we don't need in powernow-k7

The VIDC/FIDC controls could have been left at 1 from a previous call to
one of the scaling routines. Make sure we set them back to 0 to avoid
writing garbage into the scaling registers.

arch/i386/kernel/cpu/cpufreq/powernow-k7.c

@@ -196,6 +196,7 @@ static void change_FID(int fid)
 	if (fidvidctl.bits.FID != fid) {
 		fidvidctl.bits.SGTC = latency;
 		fidvidctl.bits.FID = fid;
+		fidvidctl.bits.VIDC = 0;
 		fidvidctl.bits.FIDC = 1;
 		wrmsrl (MSR_K7_FID_VID_CTL, fidvidctl.val);
 	}
@@ -210,6 +211,7 @@ static void change_VID(int vid)
 	if (fidvidctl.bits.VID != vid) {
 		fidvidctl.bits.SGTC = latency;
 		fidvidctl.bits.VID = vid;
+		fidvidctl.bits.FIDC = 0;
 		fidvidctl.bits.VIDC = 1;
 		wrmsrl (MSR_K7_FID_VID_CTL, fidvidctl.val);
 	}