[source] ramips: mt7621: add missing kernel symbol

[LEDE Commits]

jow pushed a commit to source.git, branch master:
https://git.lede-project.org/?p=source.git;a=commitdiff;h=b051ac76e83f2245f06fda852b0779f328d2954b

commit b051ac76e83f2245f06fda852b0779f328d2954b
Author: Jo-Philipp Wich <jo at mein.io>
AuthorDate: Sat Jul 16 13:59:06 2016 +0200

    ramips: mt7621: add missing kernel symbol
    
    Signed-off-by: Jo-Philipp Wich <jo at mein.io>
---
 target/linux/ramips/mt7621/config-4.4 | 1 +
 1 file changed, 1 insertion(+)

diff --git a/target/linux/ramips/mt7621/config-4.4 b/target/linux/ramips/mt7621/config-4.4
index 58568c8..9132d89 100644
--- a/target/linux/ramips/mt7621/config-4.4
+++ b/target/linux/ramips/mt7621/config-4.4
@@ -115,6 +115,7 @@ CONFIG_HAVE_VIRT_CPU_ACCOUNTING_GEN=y
 CONFIG_HIGHMEM=y
 CONFIG_HW_HAS_PCI=y
 CONFIG_HZ_PERIODIC=y
+# CONFIG_IMG_MDC_DMA is not set
 CONFIG_INITRAMFS_SOURCE=""
 CONFIG_IRQCHIP=y
 CONFIG_IRQ_DOMAIN=y