agx: Use pseudo ops for mov/not/and/xor/or

Rather than using builder magic (implicitly lowered on emit), add actual pseudo
operations (explicitly lowered before encoding). In theory this is slower, I
doubt it matters. This makes the instruction aliases first-class for IR prining
and machine inspection, which will make optimization passes easier to write.

Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/16268>

src/asahi/compiler/agx_compiler.h

@@ -661,6 +661,7 @@ void agx_print_instr(agx_instr *I, FILE *fp);
 void agx_print_block(agx_block *block, FILE *fp);
 void agx_print_shader(agx_context *ctx, FILE *fp);
 void agx_optimizer(agx_context *ctx);
+void agx_lower_pseudo(agx_context *ctx);
 void agx_dce(agx_context *ctx);
 void agx_ra(agx_context *ctx);
 void agx_pack_binary(agx_context *ctx, struct util_dynarray *emission);