[source] ramips: add back the i2c-mt7621 module

[LEDE Commits]

blogic pushed a commit to source.git, branch master:
https://git.lede-project.org/c067011af899bf637215849948a962241a3ed62a

commit c067011af899bf637215849948a962241a3ed62a
Author: John Crispin <john at phrozen.org>
AuthorDate: Sun Jan 15 20:45:14 2017 +0100

    ramips: add back the i2c-mt7621 module
    
    mt7628/88 are still using this module.
    
    Signed-off-by: John Crispin <john at phrozen.org>
---
 target/linux/ramips/modules.mk | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/target/linux/ramips/modules.mk b/target/linux/ramips/modules.mk
index c2b6f50..2bece6f 100644
--- a/target/linux/ramips/modules.mk
+++ b/target/linux/ramips/modules.mk
@@ -58,6 +58,22 @@ endef
 $(eval $(call KernelPackage,i2c-ralink))
 
 
+I2C_MT7621_MODULES:= \
+  CONFIG_I2C_MT7621:drivers/i2c/busses/i2c-mt7621
+
+define KernelPackage/i2c-mt7628
+  $(call i2c_defaults,$(I2C_MT7621_MODULES),59)
+  TITLE:=MT7628/88 I2C Controller
+  DEPENDS:=kmod-i2c-core \
+	@(TARGET_ramips_mt7628||TARGET_ramips_mt7688)
+endef
+
+define KernelPackage/i2c-mt7628/description
+ Kernel modules for enable mt7621 i2c controller.
+endef
+
+$(eval $(call KernelPackage,i2c-mt7628))
+
 define KernelPackage/dma-ralink
   SUBMENU:=Other modules
   TITLE:=Ralink GDMA Engine