configs: j7200_evm_r5_defconfig: Define K3_OPP_LOW

Define new CONFIG_K3_OPP_LOW under arm/mach-k3/r5/Kconfig and add
default value to j7200_evm_r5_defconfig

Signed-off-by: Reid Tonking <reidt@ti.com>
Signed-off-by: Aniket Limaye <a-limaye@ti.com>
diff --git a/configs/j7200_evm_r5_defconfig b/configs/j7200_evm_r5_defconfig
index f036a6f..217759e 100644
--- a/configs/j7200_evm_r5_defconfig
+++ b/configs/j7200_evm_r5_defconfig
@@ -102,6 +102,7 @@
 CONFIG_FS_LOADER=y
 CONFIG_SPL_FS_LOADER=y
 CONFIG_K3_AVS0=y
+# CONFIG_K3_OPP_LOW is not set
 CONFIG_SUPPORT_EMMC_BOOT=y
 CONFIG_SPL_MMC_HS400_SUPPORT=y
 CONFIG_MMC_SDHCI=y