ramips: merge two patches 101-mt7621-timer and 998-mt7621-needs-jiffies

These two patches both modified the mt7621.c, and the patch file
998-mt7621-needs-jiffies.patch adds only one line which is used by the
another patch file. So merge them into one file.

Signed-off-by: Weijie Gao <hackpascal@gmail.com>

target/linux/ramips/patches-4.14/101-mt7621-timer.patch

@@ -1,5 +1,13 @@
 --- a/arch/mips/ralink/mt7621.c
 +++ b/arch/mips/ralink/mt7621.c
+@@ -9,6 +9,7 @@
+ 
+ #include <linux/kernel.h>
+ #include <linux/init.h>
++#include <linux/jiffies.h>
+ 
+ #include <asm/mipsregs.h>
+ #include <asm/smp-ops.h>
 @@ -16,6 +16,7 @@
  #include <asm/mach-ralink/ralink_regs.h>
  #include <asm/mach-ralink/mt7621.h>

target/linux/ramips/patches-4.14/998-mt7621-needs-jiffies.patch

@@ -1,10 +0,0 @@
---- a/arch/mips/ralink/mt7621.c
-+++ b/arch/mips/ralink/mt7621.c
-@@ -9,6 +9,7 @@
- 
- #include <linux/kernel.h>
- #include <linux/init.h>
-+#include <linux/jiffies.h>
- 
- #include <asm/mipsregs.h>
- #include <asm/smp-ops.h>