ARM: gr8: Rename the DTSI and relevant DTS

Reviews have found that sun5i was a better prefix after all for the GR8.
Rename the relevant device trees before it's too late.

Signed-off-by: Maxime Ripard <[e-mail]>

arch/arm/boot/dts/Makefile

···
 	sun4i-a10-pcduino2.dtb \
 	sun4i-a10-pov-protab2-ips9.dtb
 dtb-$(CONFIG_MACH_SUN5I) += \
-	ntc-gr8-evb.dtb \
 	sun5i-a10s-auxtek-t003.dtb \
 	sun5i-a10s-auxtek-t004.dtb \
 	sun5i-a10s-mk802.dtb \
···
 	sun5i-a13-olinuxino-micro.dtb \
 	sun5i-a13-q8-tablet.dtb \
 	sun5i-a13-utoo-p66.dtb \
+	sun5i-gr8-evb.dtb \
 	sun5i-r8-chip.dtb
 dtb-$(CONFIG_MACH_SUN6I) += \
 	sun6i-a31-app4-evb1.dtb \

arch/arm/boot/dts/ntc-gr8-evb.dts arch/arm/boot/dts/sun5i-gr8-evb.dts

···
  */
 
 /dts-v1/;
-#include "ntc-gr8.dtsi"
+#include "sun5i-gr8.dtsi"
 #include "sunxi-common-regulators.dtsi"
 
 #include <dt-bindings/gpio/gpio.h>