imx8: Run SPL with caches enabled

It is safe to run SPL with caches enabled on i.MX8, so
remove such restriction.
Signed-off-by: NFabio Estevam <festevam@gmail.com>
Acked-by: NPeng Fan <peng.fan@nxp.com>
Acked-by: NOliver Graute <oliver.graute@kococonnector.com>
Acked-by: NAnatolij Gustschin <agust@denx.de>
Tested-by: NIgor Opaniuk <igor.opaniuk@toradex.com>
Acked-by: NIgor Opaniuk <igor.opaniuk@toradex.com>

configs/deneb_defconfig

 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_SPL_GPIO_SUPPORT=y

configs/giedi_defconfig

 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_SPL_GPIO_SUPPORT=y

configs/imx8mm_evk_defconfig

 CONFIG_ARM=y
-CONFIG_SPL_SYS_ICACHE_OFF=y
-CONFIG_SPL_SYS_DCACHE_OFF=y
 CONFIG_ARCH_IMX8M=y
 CONFIG_SYS_TEXT_BASE=0x40200000
 CONFIG_SPL_GPIO_SUPPORT=y

configs/imx8mn_ddr4_evk_defconfig

 CONFIG_ARM=y
-CONFIG_SPL_SYS_ICACHE_OFF=y
-CONFIG_SPL_SYS_DCACHE_OFF=y
 CONFIG_ARCH_IMX8M=y
 CONFIG_SYS_TEXT_BASE=0x40200000
 CONFIG_SPL_GPIO_SUPPORT=y

configs/imx8mp_evk_defconfig

 CONFIG_ARM=y
-CONFIG_SPL_SYS_ICACHE_OFF=y
-CONFIG_SPL_SYS_DCACHE_OFF=y
 CONFIG_ARCH_IMX8M=y
 CONFIG_SYS_TEXT_BASE=0x40200000
 CONFIG_SPL_GPIO_SUPPORT=y

configs/imx8mq_evk_defconfig

 CONFIG_ARM=y
-CONFIG_SPL_SYS_ICACHE_OFF=y
-CONFIG_SPL_SYS_DCACHE_OFF=y
 CONFIG_ARCH_IMX8M=y
 CONFIG_SYS_TEXT_BASE=0x40200000
 CONFIG_ENV_SIZE=0x1000

configs/imx8qm_mek_defconfig

 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_SPL_GPIO_SUPPORT=y

configs/imx8qm_rom7720_a1_4G_defconfig

 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_SPL_GPIO_SUPPORT=y

configs/verdin-imx8mm_defconfig

 CONFIG_ARM=y
-CONFIG_SPL_SYS_ICACHE_OFF=y
-CONFIG_SPL_SYS_DCACHE_OFF=y
 CONFIG_ARCH_IMX8M=y
 CONFIG_SYS_TEXT_BASE=0x40200000
 CONFIG_SPL_GPIO_SUPPORT=y