riscv: Introduce Vector enable/disable helpers
These are small and likely to be frequently called so implement as inline routines (vs. function call). Co-developed-by:Guo Ren <guoren@linux.alibaba.com> Signed-off-by:
Guo Ren <guoren@linux.alibaba.com> Co-developed-by:
Vincent Chen <vincent.chen@sifive.com> Signed-off-by:
Vincent Chen <vincent.chen@sifive.com> Signed-off-by:
Greentime Hu <greentime.hu@sifive.com> Signed-off-by:
Vineet Gupta <vineetg@rivosinc.com> [vineetg: create new patch from meshup, introduced asm variant] Signed-off-by:
Andy Chiu <andy.chiu@sifive.com> [andy.chiu: remove calls from asm thus remove asm vaiant]
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