sonynwz: add NW-ZX300G nvp info

There is something weird going on: the Sony website has two different entries:
- NW-ZX300/NW-ZX300A/NW-A45/NW-A47/NW-A45HN/NW-A46HN
- NW-ZX300,NW-ZX300A update(20181004)/NW-ZX300G
with slightly different nvp entries, but it is impossible to tell whether
an NW-ZX300(A) belong to one or the other. Since the diff is very small,
I am adding this as nw-zx300g but treat all devices as nz-zx300 since the
destination node is the same and that is the main usage of the tool anyway.

Change-Id: I3dc2fdec52650f938d568bed578184f6bc43d130

utils/nwztools/database/nvp/nw-zx300g.txt

@@ -0,0 +1,93 @@
+dbg,000
+syi,001
+ubp,002
+fup,003
+prk,004
+hld,005
+pwd,006
+mid,007
+pcd,008
+ser,009
+ufn,010
+kas,011
+shp,012
+tst,013
+gty,014
+clg,015
+se2,016
+ncp,017
+psk,018
+nvr,077
+she,084
+btc,085
+ins,089
+ctr,090
+sku,091
+bpr,019
+bfp,020
+bfd,021
+bml,022
+apd,078
+blf,079
+slp,080
+vrt,081
+fni,082
+sid,083
+mso,086
+dgs,092
+atf,023
+lyr,024
+dbv,025
+fur,026
+ums,027
+skd,028
+ups,029
+aws,030
+fvi,031
+mac,032
+fpi,033
+ssk,034
+tr1,035
+e00,036
+e01,037
+e02,038
+e03,039
+e04,040
+e05,041
+e06,042
+e07,043
+e08,044
+e09,045
+e10,046
+e11,047
+e12,048
+e13,049
+e14,050
+e15,051
+e16,052
+e17,053
+e18,054
+e19,055
+e20,056
+e21,057
+e22,058
+e23,059
+e24,060
+e25,061
+e26,062
+e27,063
+e28,064
+e29,065
+e30,066
+e31,067
+clv,068
+sps,069
+rbt,070
+edw,071
+bti,072
+hdi,073
+lbi,074
+fui,075
+eri,076
+pci,087
+dbi,088