ARM: renesas: Disable EFI on R-Car Gen2

These systems are unlikely to use EFI as this functionality has not been
enabled until it got pulled in by Kconfig default. This functionality
does add some 60-70 kiB to the u-boot.img size, which overflows the size
limit. Disable it.

Signed-off-by: Marek Vasut <marek.vasut+renesas@mailbox.org>
Reviewed-by: Paul Barker <paul.barker.ct@bp.renesas.com>
diff --git a/configs/silk_defconfig b/configs/silk_defconfig
index 7c6b5b5..5f08ae0 100644
--- a/configs/silk_defconfig
+++ b/configs/silk_defconfig
@@ -68,6 +68,7 @@
 CONFIG_CMD_MTDPARTS=y
 CONFIG_MTDIDS_DEFAULT="nor0=spi0.0"
 CONFIG_MTDPARTS_DEFAULT="mtdparts=spi0.0:256k(u-boot-spl),512k(u-boot-env1),512k(u-boot-env2),768k(u-boot),-(user)"
+CONFIG_PARTITION_UUIDS=y
 CONFIG_OF_CONTROL=y
 CONFIG_ENV_OVERWRITE=y
 CONFIG_ENV_IS_IN_SPI_FLASH=y
@@ -106,3 +107,4 @@
 CONFIG_USB_EHCI_PCI=y
 CONFIG_USB_STORAGE=y
 CONFIG_SYS_TIMER_COUNTS_DOWN=y
+# CONFIG_EFI_LOADER is not set