stdlib: Drop duplicates of min() and max()

Change-Id: Ib2f6fad735e085d237a0d46e0586e123eef6e0e2
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: http://review.coreboot.org/6161
Tested-by: build bot (Jenkins)
Reviewed-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>

src/include/spi_flash.h

@@ -39,8 +39,6 @@
 	const typeof( ((type *)0)->member ) *__mptr = (ptr);	\
 	(type *)( (char *)__mptr - offsetof(type,member) );})
 
-#define min(a, b) ((a)<(b)?(a):(b))
-
 #define CONFIG_ICH_SPI
 #ifdef CONFIG_ICH_SPI
 #define CONTROLLER_PAGE_LIMIT	64