Add missing mrc fees to reward used for SplitCoinStakeOutput #1961

Job	Run time
Lint	54s
macOS 12 native [GOAL install] [GUI] [no depends]	12m 28s
ARM [GOAL install] [buster]	12m 12s
Win32	13m 23s
Win64	38m 53s
i386 Linux [GOAL install] [focal]	13m 35s
x86_64 Linux [GOAL install] [GUI] [focal] [no depends]	16m 23s
x86_64 Linux [GOAL install] [GUI] [bionic] [no depends]	15m 34s
macOS 10.14 [GOAL deploy] [GUI] [no tests] [focal]	37m 43s
	2h 41m 5s

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