[CPUFREQ] Longhaul - Readd accidentally dropped line

I lost very important line in do_powersaver

Signed-off-by: Rafa³ Bilski <rafalbilski@interia.pl>
Signed-off-by: Dave Jones <davej@redhat.com>

arch/i386/kernel/cpu/cpufreq/longhaul.c

@@ -162,6 +162,7 @@ static void do_powersaver(int cx_address, unsigned int clock_ratio_index)
 	longhaul.bits.RevisionKey = longhaul.bits.RevisionID;
 	longhaul.bits.SoftBusRatio = clock_ratio_index & 0xf;
 	longhaul.bits.SoftBusRatio4 = (clock_ratio_index & 0x10) >> 4;
+	longhaul.bits.EnableSoftBusRatio = 1;
 
 	/* Sync to timer tick */
 	safe_halt();