video: mb862xx: improve board-specific Lime configuration

To avoid board-specific code accessing the mb862xx registers directly,
the public function mb862xx_probe() has been introduced. Furthermore,
the "Change of Clock Frequency" and "Set Memory I/F Mode" registers
are now defined by CONFIG_SYS_MB862xx_CCF and CONFIG_SYS_MB862xx__MMR,
respectively. The BSPs for the socrates and lwmon5 boards have been
adapted accordingly.

Signed-off-by: Wolfgang Grandegger <wg@denx.de>

include/mb862xx.h

@@ -32,6 +32,8 @@
 #define PCI_DEVICE_ID_CORAL_P	0x2019
 #define PCI_DEVICE_ID_CORAL_PA	0x201E
 
+#define MB862XX_TYPE_LIME	0x1
+
 #define GC_HOST_BASE		0x01fc0000
 #define GC_DISP_BASE		0x01fd0000
 #define GC_DRAW_BASE		0x01ff0000
@@ -39,6 +41,7 @@
 /* Host interface registers */
 #define GC_SRST			0x0000002c
 #define GC_CCF			0x00000038
+#define GC_CID			0x000000f0
 #define GC_MMR			0x0000fffc
 
 /*
@@ -99,6 +102,7 @@
 #define GC_FC			0x00000480
 #define GC_BC			0x00000484
 #define GC_FIFO			0x000004a0
+#define GC_REV			0x00008084
 #define GC_GEO_FIFO		0x00008400
 
 typedef struct {
@@ -106,6 +110,7 @@ typedef struct {
 	unsigned int value;
 } gdc_regs;
 
+int mb862xx_probe(unsigned int addr);
 const gdc_regs *board_get_regs (void);
 unsigned int board_video_init (void);
 void board_backlight_switch(int);