ugps: fix typo

Removing redundant spaces from the name of the option. Without fix:

root@LEDE:~# opkg install ugps
Installing ugps (2016-10-24-32a6b2b7-1) to root...
Downloading http://downloads.lede-project.org/releases/17.01-SNAPSHOT/packages/mips_24kc/base/ugps_2016-10-24-32a6b2b7-1_mips_24kc.ipk
Configuring ugps.
uci: Parse error (invalid character in name field) at line 3, byte 23
uci: Parse error (invalid character in name field) at line 3, byte 23
sh: out of range
root@LEDE:~# uci show gps
uci: Parse error (invalid character in name field) at line 3, byte 23

With this fix:

root@LEDE:~# uci show gps
gps.@gps[0]=gps
gps.@gps[0].tty='ttyACM0'
gps.@gps[0].adjust_time='1'

Signed-off-by: Cezary Jackiewicz <cezary@eko.one.pl>