cgtqmx8: Enable cache in SPL

There is no reason for disabling I-cache and D-cache
in SPL.

Remove the unneeded CONFIG_SPL_SYS_ICACHE_OFF and
CONFIG_SPL_SYS_DCACHE_OFF options.

Signed-off-by: Fabio Estevam <festevam@denx.de>
diff --git a/configs/cgtqmx8_defconfig b/configs/cgtqmx8_defconfig
index 2cf882f..c53fa74 100644
--- a/configs/cgtqmx8_defconfig
+++ b/configs/cgtqmx8_defconfig
@@ -1,6 +1,4 @@
 CONFIG_ARM=y
-CONFIG_SPL_SYS_ICACHE_OFF=y
-CONFIG_SPL_SYS_DCACHE_OFF=y
 CONFIG_ARCH_IMX8=y
 CONFIG_SYS_TEXT_BASE=0x80020000
 CONFIG_SYS_MALLOC_LEN=0x2400000