patches/openwrt: linux: add patch for gpio mpc85xx

Before this patch applied on Turris 1.1:

[   16.392988] lm90 0-004c: cannot request IRQ 48
[   16.398280] lm90: probe of 0-004c failed with error -22

root@turris:~# sensors
No sensors found!
Make sure you loaded all the kernel drivers you need.
Try sensors-detect to find out which these are.

After this patch applied on the same router:

root@turris:/# sensors
sa56004-i2c-0-4c
Adapter: MPC adapter (i2c@3000)
temp1:        +44.0°C  (low  =  +0.0°C, high = +70.0°C)
                       (crit = +85.0°C, hyst = +75.0°C)
temp2:        +73.8°C  (low  =  +0.0°C, high = +70.0°C)  ALARM (HIGH)
                       (crit = +85.0°C, hyst = +75.0°C)