phycore-rk3288: Avoid enabling partition support in SPL

This is not needed or used, and adds code size. Drop it.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
diff --git a/configs/phycore-rk3288_defconfig b/configs/phycore-rk3288_defconfig
index 6444649..d3d7478 100644
--- a/configs/phycore-rk3288_defconfig
+++ b/configs/phycore-rk3288_defconfig
@@ -35,6 +35,7 @@
 CONFIG_CMD_TIME=y
 CONFIG_CMD_PMIC=y
 CONFIG_CMD_REGULATOR=y
+# CONFIG_SPL_PARTITIONS is not set
 # CONFIG_SPL_DOS_PARTITION is not set
 # CONFIG_SPL_EFI_PARTITION is not set
 CONFIG_SPL_OF_CONTROL=y