unicore32 machine related: add frame buffer driver for pkunity-v3 soc

change from original version -- by advice of Paul Mundt
1. remove videomemorysize definitions
2. remove unifb_enable and unifb_setup
3. use dev_warn instead of printk in fb driver
4. remove judgement for FB_ACCEL_PUV3_UNIGFX
5. adjust clk_get and clk_set_rate calls
6. add resources definitions
7. remove unifb_option
8. adjust register for platform_device
9. adjust unifb_ops position and unifb_regs assignment position

Signed-off-by: Guan Xuetao <gxt@mprc.pku.edu.cn>
Acked-by: Arnd Bergmann <arnd@arndb.de>
diff --git a/MAINTAINERS b/MAINTAINERS
index fa842ba..98f942e 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -4902,6 +4902,7 @@
 T:	git git://git.kernel.org/pub/scm/linux/kernel/git/epip/linux-2.6-unicore32.git
 F:	drivers/input/serio/i8042-unicore32io.h
 F:	drivers/i2c/busses/i2c-puv3.c
+F:	drivers/video/fb-puv3.c
 
 PMC SIERRA MaxRAID DRIVER
 M:	Anil Ravindranath <anil_ravindranath@pmc-sierra.com>