imx8qxp_mek: Disable CONFIG_DISPLAY_CPUINFO

Due to revert of commit c0434407b595, this board does not build
any more. Disable CONFIG_DISPLAY_CPUINFO for v2018.11 release.

This commit should be reverted after v2018.11 release.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Acked-by: Peng Fan <peng.fan@nxp.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

configs/imx8qxp_mek_defconfig

@@ -6,6 +6,7 @@ CONFIG_SYS_MALLOC_F_LEN=0x2000
 CONFIG_TARGET_IMX8QXP_MEK=y
 CONFIG_NR_DRAM_BANKS=3
 CONFIG_BOOTDELAY=3
+# CONFIG_DISPLAY_CPUINFO is not set
 CONFIG_CMD_CPU=y
 # CONFIG_CMD_IMPORTENV is not set
 CONFIG_CMD_CLK=y