MIPS: qemu_mips: move CONFIG_SYS_TEXT_BASE to qemu-mips.h

We define CONFIG_SYS_TEXT_BASE in board's specified header file.
So config.mk is useless, then remove it.
Signed-off-by: NZhizhou Zhang <etou.zh@gmail.com>

board/qemu-mips/config.mk

-#
-# Qemu -M mips system emulator
-# See http://fabrice.bellard.free.fr/qemu
-#
-
-# ROM version
-CONFIG_SYS_TEXT_BASE = 0xbfc00000
-
-# RAM version
-#CONFIG_SYS_TEXT_BASE = 0x80001000

include/configs/qemu-mips.h

@@ -137,6 +137,7 @@
  */
 
 /* The following #defines are needed to get flash environment right */
+#define CONFIG_SYS_TEXT_BASE		0xbfc00000 /* Rom version */
 #define CONFIG_SYS_MONITOR_BASE	CONFIG_SYS_TEXT_BASE
 #define CONFIG_SYS_MONITOR_LEN		(192 << 10)