nvptx: Enhance '-march-map=[...]' test cases
This expands upon the one test case added in
commit
de0ef04419e90eacf0d1ddb265552a1b08c18d4b "[nvptx] Add march-map".
gcc/testsuite/
* gcc.target/nvptx/march-map.c: Remove; expanded into...
* gcc.target/nvptx/march-map=sm_50.c: ... this.
* gcc.target/nvptx/march-map=sm_30.c: New.
* gcc.target/nvptx/march-map=sm_32.c: Likewise.
* gcc.target/nvptx/march-map=sm_35.c: Likewise.
* gcc.target/nvptx/march-map=sm_37.c: Likewise.
* gcc.target/nvptx/march-map=sm_52.c: Likewise.
* gcc.target/nvptx/march-map=sm_53.c: Likewise.
* gcc.target/nvptx/march-map=sm_60.c: Likewise.
* gcc.target/nvptx/march-map=sm_61.c: Likewise.
* gcc.target/nvptx/march-map=sm_62.c: Likewise.
* gcc.target/nvptx/march-map=sm_70.c: Likewise.
* gcc.target/nvptx/march-map=sm_72.c: Likewise.
* gcc.target/nvptx/march-map=sm_75.c: Likewise.
* gcc.target/nvptx/march-map=sm_80.c: Likewise.
* gcc.target/nvptx/march-map=sm_86.c: Likewise.
* gcc.target/nvptx/march-map=sm_87.c: Likewise.
* gcc.target/nvptx/march-map=sm_89.c: Likewise.
* gcc.target/nvptx/march-map=sm_90.c: Likewise.
* gcc.target/nvptx/march-map=sm_90a.c: Likewise.
* gcc.target/nvptx/main.c: Remove.