Convert CONFIG_SYS_MPC85XX_NO_RESETVEC to Kconfig

This converts the following to Kconfig:
   CONFIG_SYS_MPC85XX_NO_RESETVEC

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/configs/T2080RDB_SPIFLASH_defconfig b/configs/T2080RDB_SPIFLASH_defconfig
index 23c233e..c171e34 100644
--- a/configs/T2080RDB_SPIFLASH_defconfig
+++ b/configs/T2080RDB_SPIFLASH_defconfig
@@ -18,6 +18,7 @@
 CONFIG_SPL_SPI=y
 CONFIG_MPC85xx=y
 CONFIG_TARGET_T2080RDB=y
+CONFIG_SYS_MPC85XX_NO_RESETVEC=y
 CONFIG_SYS_MEMTEST_START=0x00200000
 CONFIG_SYS_MEMTEST_END=0x00400000
 CONFIG_MP=y