km/km82xx: remove CONFIG_SYS_RAMBOOT

This define is never set in our setup, so we can remove it safely. The
former code causes cppcheck to complain about:
[board/keymile/km82xx/km82xx.c:311]: (error) Uninitialized variable:
psize

Signed-off-by: Holger Brunck <holger.brunck@keymile.com>
cc: Valentin Longchamp <valentin.longchamp@keymile.com>
cc: Wolfgang Denk <wd@denx.de>
Reviewed-by: York Sun <yorksun@freescale.com>

board/keymile/km82xx/km82xx.c

@@ -300,11 +300,9 @@ phys_size_t initdram(int board_type)
 	out_8(&memctl->memc_psrt, CONFIG_SYS_PSRT);
 	out_be16(&memctl->memc_mptpr, CONFIG_SYS_MPTPR);
 
-#ifndef CONFIG_SYS_RAMBOOT
 	/* 60x SDRAM setup:
 	 */
 	psize = probe_sdram(memctl);
-#endif /* CONFIG_SYS_RAMBOOT */
 
 	icache_enable();
 

include/configs/km82xx.h

@@ -207,9 +207,6 @@
 	""
 
 #define CONFIG_SYS_MONITOR_BASE	CONFIG_SYS_TEXT_BASE
-#if (CONFIG_SYS_MONITOR_BASE < CONFIG_SYS_FLASH_BASE)
-#define CONFIG_SYS_RAMBOOT
-#endif
 
 #define CONFIG_SYS_MONITOR_LEN		(768 << 10)