OMAPDSS: Add enum dss_pll_id

In some cases we need global identifiers for the DSS PLLs, for example
when configuring clock muxing on DRA7. For this purpose let's add a
'enum dss_pll_id'.

Signed-off-by: Tomi Valkeinen <[e-mail]>

drivers/video/fbdev/omap2/dss/dsi.c

···
 	}
 
 	pll->name = dsi->module_id == 0 ? "dsi0" : "dsi1";
+	pll->id = dsi->module_id == 0 ? DSS_PLL_DSI1 : DSS_PLL_DSI2;
 	pll->clkin = clk;
 	pll->base = dsi->pll_base;
 

drivers/video/fbdev/omap2/dss/dss.h

···
 	DSS_WB_LCD3_MGR =	7,
 };
 
+enum dss_pll_id {
+	DSS_PLL_DSI1,
+	DSS_PLL_DSI2,
+	DSS_PLL_HDMI,
+};
+
 struct dss_pll;
 
 #define DSS_PLL_MAX_HSDIVS 4
···
 
 struct dss_pll {
 	const char *name;
+	enum dss_pll_id id;
 
 	struct clk *clkin;
 	struct regulator *regulator;

drivers/video/fbdev/omap2/dss/hdmi_pll.c

···
 	}
 
 	pll->name = "hdmi";
+	pll->id = DSS_PLL_HDMI;
 	pll->base = hpll->base;
 	pll->clkin = clk;