nir: Make boolean conversions sized just like the others

Instead of a single i2b and b2i, we now have i2b32 and b2iN where N is
one if 8, 16, 32, or 64.  This leads to having a few more opcodes but
now everything is consistent and booleans aren't a weird special case
anymore.

Reviewed-by: Connor Abbott <cwabbott0@gmail.com>

src/compiler/nir/nir_builder.h

@@ -963,6 +963,18 @@ nir_load_param(nir_builder *build, uint32_t param_idx)
 
 #include "nir_builder_opcodes.h"
 
+static inline nir_ssa_def *
+nir_f2b(nir_builder *build, nir_ssa_def *f)
+{
+   return nir_f2b32(build, f);
+}
+
+static inline nir_ssa_def *
+nir_i2b(nir_builder *build, nir_ssa_def *i)
+{
+   return nir_i2b32(build, i);
+}
+
 static inline nir_ssa_def *
 nir_load_barycentric(nir_builder *build, nir_intrinsic_op op,
                      unsigned interp_mode)