cmd/asm: add x86 AMX instructions

Added instructions LDTILECFG, STTILECFG, TDPBF16PS,
TDPBSSD, TDPBSUD, TDPBUSD, TDPBUUD, TILELOADD,
TILELOADDT1, TILESTORED

Fixes: #61079

Author: anton-kuklin

src/cmd/internal/obj/x86/aenum.go

@@ -192,6 +192,7 @@ const (
 	Ytextsize
 	Yindir
 	Ymax
+	Ytr
 )
 
 const (
@@ -315,10 +316,6 @@ const (
 	// The P, L, and W fields are chosen to match
 	// their eventual locations in the VEX prefix bytes.
 
-	// Encoding for VEX prefix in tables.
-	// The P, L, and W fields are chosen to match
-	// their eventual locations in the VEX prefix bytes.
-
 	// Using spare bit to make leading [E]VEX encoding byte different from
 	// 0x0f even if all other VEX fields are 0.
 	avxEscape = 1 << 6