ARM: qcom_defconfig: Fix MDM9515 LCC and GCC config

Correct prefix is MDM instead of MSM.

Fixes: 8aa788d3 ("ARM: configs: qualcomm: Add MDM9615 missing defconfigs")
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Reviewed-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Andy Gross <andy.gross@linaro.org>

arch/arm/configs/qcom_defconfig

@@ -162,8 +162,8 @@ CONFIG_APQ_MMCC_8084=y
 CONFIG_IPQ_LCC_806X=y
 CONFIG_MSM_GCC_8660=y
 CONFIG_MSM_LCC_8960=y
-CONFIG_MSM_GCC_9615=y
-CONFIG_MSM_LCC_9615=y
+CONFIG_MDM_GCC_9615=y
+CONFIG_MDM_LCC_9615=y
 CONFIG_MSM_MMCC_8960=y
 CONFIG_MSM_MMCC_8974=y
 CONFIG_HWSPINLOCK_QCOM=y