arm64: configs: rk3308_linux_defconfig: enable initrd support

Change-Id: I81d91a25af09a222f013e28fe643482857d6a9d3
Signed-off-by: Ziyuan Xu <xzy.xu@rock-chips.com>

Author: Ziyuan Xu

arch/arm64/configs/rk3308_linux_defconfig

@@ -6,6 +6,12 @@ CONFIG_FHANDLE=y
 CONFIG_NO_HZ=y
 CONFIG_HIGH_RES_TIMERS=y
 CONFIG_LOG_BUF_SHIFT=18
+CONFIG_BLK_DEV_INITRD=y
+# CONFIG_RD_BZIP2 is not set
+# CONFIG_RD_LZMA is not set
+# CONFIG_RD_XZ is not set
+# CONFIG_RD_LZO is not set
+# CONFIG_RD_LZ4 is not set
 CONFIG_CC_OPTIMIZE_FOR_SIZE=y
 CONFIG_EMBEDDED=y
 # CONFIG_SLUB_DEBUG is not set