feat(loong64): encode the full LSX and LASX table

Assisted-by: GLM 5.3 Flash

testdata/verify/pseudos_loong64.s

@@ -0,0 +1,31 @@
+// Differential kernel: the bookkeeping statements the assembler accepts and
+// encodes to nothing (gasm v. go tool asm, byte for byte).
+
+#include "textflag.h"
+
+TEXT ·end(SB), NOSPLIT, $0
+	END
+	RET
+
+TEXT ·funcdata(SB), NOSPLIT, $0
+	FUNCDATA $0, ref(SB)
+	RET
+
+TEXT ·pcdata(SB), NOSPLIT, $0
+	PCDATA $0, $1
+	PCDATA $1, $-2
+	RET
+
+TEXT ·getcallerpc(SB), NOSPLIT, $0
+	GETCALLERPC R4
+	RET
+
+TEXT ·mixed(SB), NOSPLIT, $0
+	PCDATA      $0, $1
+	ADDV        R4, R5, R6
+	FUNCDATA    $1, ref(SB)
+	GETCALLERPC R7
+	RET
+
+ref:
+	RET