OMAP2+: voltage: move VC into struct voltagedomain, misc. renames

Move the VC instance struct from omap_vdd_info into struct voltagedomain.
While moving, perform some misc. renames for readability.

No functional changes.

Summary of renames:
- rename omap_vc_instance to omap_vc_channel, since there is only
  one instance of the VC IP and this actually represents channels
  using TRM terminology.
- rename 'vc_common' field of VC channel which led to:
  s/vc->vc_common/vc->common/
- remove redundant '_data' suffix
- OMAP3: vc1 --> vc_mpu, vc2 --> vc_core
- omap_vc_bypass_scale_voltage() -> omap_vc_bypass_scale()

Signed-off-by: Kevin Hilman <khilman@ti.com>

merge
diff --git a/arch/arm/mach-omap2/voltagedomains44xx_data.c b/arch/arm/mach-omap2/voltagedomains44xx_data.c
index 9a17b5e..a05d90a 100644
--- a/arch/arm/mach-omap2/voltagedomains44xx_data.c
+++ b/arch/arm/mach-omap2/voltagedomains44xx_data.c
@@ -40,7 +40,6 @@
 	.prm_irqst_mod = OMAP4430_PRM_OCP_SOCKET_INST,
 	.prm_irqst_reg = OMAP4_PRM_IRQSTATUS_MPU_2_OFFSET,
 	.vp_data = &omap4_vp_mpu_data,
-	.vc_data = &omap4_vc_mpu_data,
 	.vfsm = &omap4_vdd_mpu_vfsm_data,
 };
 
@@ -52,7 +51,6 @@
 	.prm_irqst_mod = OMAP4430_PRM_OCP_SOCKET_INST,
 	.prm_irqst_reg = OMAP4_PRM_IRQSTATUS_MPU_OFFSET,
 	.vp_data = &omap4_vp_iva_data,
-	.vc_data = &omap4_vc_iva_data,
 	.vfsm = &omap4_vdd_iva_vfsm_data,
 };
 
@@ -64,25 +62,27 @@
 	.prm_irqst_mod = OMAP4430_PRM_OCP_SOCKET_INST,
 	.prm_irqst_reg = OMAP4_PRM_IRQSTATUS_MPU_OFFSET,
 	.vp_data = &omap4_vp_core_data,
-	.vc_data = &omap4_vc_core_data,
 	.vfsm = &omap4_vdd_core_vfsm_data,
 };
 
 static struct voltagedomain omap4_voltdm_mpu = {
 	.name = "mpu",
 	.scalable = true,
+	.vc = &omap4_vc_mpu,
 	.vdd = &omap4_vdd_mpu_info,
 };
 
 static struct voltagedomain omap4_voltdm_iva = {
 	.name = "iva",
 	.scalable = true,
+	.vc = &omap4_vc_iva,
 	.vdd = &omap4_vdd_iva_info,
 };
 
 static struct voltagedomain omap4_voltdm_core = {
 	.name = "core",
 	.scalable = true,
+	.vc = &omap4_vc_core,
 	.vdd = &omap4_vdd_core_info,
 };