OxPCIe uart: Split PCI bridge control

None of the PCI bridge management here is specific to the PCI UART
device/function. Also the Kconfig variable defaults are not globally
valid, fill samsung/lumpy with working values.

Change-Id: Id22631412379af1d6bf62c996357d36d7ec47ca3
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: http://review.coreboot.org/5237
Tested-by: build bot (Jenkins)
Reviewed-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>

src/include/console/uart.h

@@ -54,7 +54,6 @@ static inline void *uart_platform_baseptr(int idx)
 }
 #endif
 
-void oxford_init(void);
 void oxford_remap(unsigned int new_base);
 
 #endif /* CONSOLE_UART_H */