configs: enable CONFIG_BLOCK_CACHE for mt7623n_bpir2

This patch enables CONFIG_BLOCK_CACHE for mt7623n_bpir2.

Signed-off-by: Weijie Gao <weijie.gao@mediatek.com>
diff --git a/configs/mt7623n_bpir2_defconfig b/configs/mt7623n_bpir2_defconfig
index ae82098..f79850f 100644
--- a/configs/mt7623n_bpir2_defconfig
+++ b/configs/mt7623n_bpir2_defconfig
@@ -31,7 +31,6 @@
 CONFIG_NET_RANDOM_ETHADDR=y
 CONFIG_REGMAP=y
 CONFIG_SYSCON=y
-# CONFIG_BLOCK_CACHE is not set
 CONFIG_CLK=y
 CONFIG_DM_MMC=y
 # CONFIG_MMC_QUIRKS is not set