sunxi: Add support for the UTOO P66 tablet

The UTOO P66 is a 6" A13 tablet / lcd ereader. It features a 6" 480x800 ips
lcd screen, 512MB RAM & 4GB emmc.
Signed-off-by: NHans de Goede <hdegoede@redhat.com>
Acked-by: NIan Campbell <ijc@hellion.org.uk>

configs/UTOO_P66_defconfig

+CONFIG_SPL=y
+CONFIG_SYS_EXTRA_OPTIONS="AXP209_POWER"
+CONFIG_FDTFILE="sun5i-a13-utoo-p66.dtb"
+CONFIG_USB_MUSB_SUNXI=y
+CONFIG_USB0_VBUS_PIN="PB04"
+CONFIG_USB0_VBUS_DET="PG01"
+CONFIG_VIDEO_LCD_MODE="x:480,y:800,depth:18,pclk_khz:25000,le:2,ri:93,up:2,lo:93,hs:1,vs:1,sync:3,vmode:0"
+CONFIG_VIDEO_LCD_DCLK_PHASE=0
+CONFIG_VIDEO_LCD_POWER="PG4"
+CONFIG_VIDEO_LCD_RESET="PG11"
+CONFIG_VIDEO_LCD_BL_EN="AXP0-1"
+CONFIG_VIDEO_LCD_BL_PWM="PB2"
+CONFIG_VIDEO_LCD_TL059WV5C0=y
++S:CONFIG_MMC_SUNXI_SLOT_EXTRA=2
++S:CONFIG_MMC0_CD_PIN="PG0"
++S:CONFIG_ARM=y
++S:CONFIG_ARCH_SUNXI=y
++S:CONFIG_MACH_SUN5I=y
++S:CONFIG_DRAM_CLK=432
++S:CONFIG_DRAM_ZQ=123
++S:CONFIG_DRAM_EMR1=0