mpc5200: digsy_mtc: fix detection of Coral-PA

A delay of approximately 250 ms after PCI bus reset in
pci_mpc5xxx_init() is needed to recognize the Coral-PA
controller on the graphic extention board.

Signed-off-by: Anatolij Gustschin <agust@denx.de>
Acked-by: Detlev Zundel <dzu@denx.de>

include/configs/digsy_mtc.h

@@ -70,6 +70,7 @@
 #define CONFIG_PCI		1
 #define CONFIG_PCI_PNP		1
 #define CONFIG_PCI_SCAN_SHOW	1
+#define CONFIG_PCI_BOOTDELAY	250
 
 #define CONFIG_PCI_MEM_BUS	0x40000000
 #define CONFIG_PCI_MEM_PHYS	CONFIG_PCI_MEM_BUS