sunxi: display: Add a few extra register and constant defines

Add a few extra sunxi display registers and constant defines.

Also rename some existing defines (e.g. dropping _GCTRL) and make
some more generic (e.g. dropping the 2x scaling from
SUNXI_LCDC_TCON1_TIMING_V_TOTAL).

This is a preparation patch for adding composite video out support.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Ian Campbell <ijc@hellion.org.uk>
diff --git a/arch/arm/include/asm/arch-sunxi/clock_sun4i.h b/arch/arm/include/asm/arch-sunxi/clock_sun4i.h
index 01d3e28..a7e25f4 100644
--- a/arch/arm/include/asm/arch-sunxi/clock_sun4i.h
+++ b/arch/arm/include/asm/arch-sunxi/clock_sun4i.h
@@ -291,7 +291,7 @@
 #define CCM_LCD_CH0_CTRL_GATE		(0x1 << 31)
 
 #define CCM_LCD_CH1_CTRL_M(n)		((((n) - 1) & 0xf) << 0)
-/* We leave bit 11 set to 0, so sclk1 == sclk2 */
+#define CCM_LCD_CH1_CTRL_HALF_SCLK1	(1 << 11)
 #define CCM_LCD_CH1_CTRL_PLL3		(0 << 24)
 #define CCM_LCD_CH1_CTRL_PLL7		(1 << 24)
 #define CCM_LCD_CH1_CTRL_PLL3_2X	(2 << 24)