[source] ramips: fix mt7621 SoC detection

[LEDE Commits]

blogic pushed a commit to source.git, branch master:
https://git.lede-project.org/?p=source.git;a=commitdiff;h=69a626b4419d58b319e5080ca4aab397b58d5dce

commit 69a626b4419d58b319e5080ca4aab397b58d5dce
Author: John Crispin <john at phrozen.org>
AuthorDate: Mon Jul 4 15:20:05 2016 +0200

    ramips: fix mt7621 SoC detection
    
    Signed-off-by: John Crispin <john at phrozen.org>
---
 .../linux/ramips/patches-4.4/0105-set_mt7621_soc_type.patch   | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/target/linux/ramips/patches-4.4/0105-set_mt7621_soc_type.patch b/target/linux/ramips/patches-4.4/0105-set_mt7621_soc_type.patch
new file mode 100644
index 0000000..0ffe825
--- /dev/null
+++ b/target/linux/ramips/patches-4.4/0105-set_mt7621_soc_type.patch
@@ -0,0 +1,11 @@
+--- a/arch/mips/ralink/mt7621.c
++++ b/arch/mips/ralink/mt7621.c
+@@ -180,7 +180,7 @@
+ 	} else {
+ 		panic("mt7621: unknown SoC, n0:%08x n1:%08x\n", n0, n1);
+ 	}
+-
++	ralink_soc = MT762X_SOC_MT7621AT;
+ 	rev = __raw_readl(sysc + SYSC_REG_CHIP_REV);
+ 
+ 	snprintf(soc_info->sys_type, RAMIPS_SYS_TYPE_LEN,