msm: 8974: rename copper to 8974

The official name for copper is MSM8974.
Switch to it.

Change-Id: Ifb241232111139912477bf7b5f2e9cf5d38d0f9e
Signed-off-by: Abhimanyu Kapur <abhimany@codeaurora.org>
diff --git a/arch/arm/mach-msm/pm-8x60.c b/arch/arm/mach-msm/pm-8x60.c
index 14e6f67..b74ebfb 100644
--- a/arch/arm/mach-msm/pm-8x60.c
+++ b/arch/arm/mach-msm/pm-8x60.c
@@ -568,7 +568,7 @@
 
 static void msm_pm_qtimer_available(void)
 {
-	if (machine_is_copper())
+	if (machine_is_msm8974())
 		msm_pm_use_qtimer = true;
 }