ARM: OMAP4+: hwmod: Add hwmod flag for HWMOD_OMAP4_ZERO_CLKCTRL_OFFSET

Nearly all modules on OMAP4 and newer platforms have clkctrl offsets
that are non-zero except for the RTC on am335x. Because we rely on a
clkctrl_offset of zero to indicate no clkctrl_offset being present,
lets add a HWMOD_OMAP4_ZERO_CLKCTRL_OFFSET flag to use to indicate
hwmods that have a valid clkctrl_offset of 0.
Signed-off-by: Dave Gerlach <d-gerlach@ti.com>
Acked-by: Tero Kristo <t-kristo@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

arch/arm/mach-omap2/omap_hwmod.h

@@ -443,8 +443,12 @@ struct omap_hwmod_omap2_prcm {
  * HWMOD_OMAP4_NO_CONTEXT_LOSS_BIT: Some IP blocks don't have a PRCM
  *     module-level context loss register associated with them; this
  *     flag bit should be set in those cases
+ * HWMOD_OMAP4_ZERO_CLKCTRL_OFFSET: Some IP blocks have a valid CLKCTRL
+ *	offset of zero; this flag bit should be set in those cases to
+ *	distinguish from hwmods that have no clkctrl offset.
  */
 #define HWMOD_OMAP4_NO_CONTEXT_LOSS_BIT		(1 << 0)
+#define HWMOD_OMAP4_ZERO_CLKCTRL_OFFSET		(1 << 1)
 
 /**
  * struct omap_hwmod_omap4_prcm - OMAP4-specific PRCM data