[Bug target/97348] [nvptx] Make -misa=sm_35 the default

[vries at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97348

--- Comment #2 from Tom de Vries <vries at gcc dot gnu.org> ---
Anyway, we should be able to work around this by having gcc explicitly pass -m
sm_35 to nvptx-as:
...
-#define ASM_SPEC "%{misa=*:-m %*}"
+#define ASM_SPEC "%{misa=*:-m %*; :-m sm_35}"
...