[gn] port 522f34c (PPC AsmMatcher dep)

Similar to 4168a2e. See also comment on #113482.

Author: nico

llvm/utils/gn/secondary/llvm/lib/Target/PowerPC/AsmParser/BUILD.gn

@@ -1,7 +1,10 @@
 import("//llvm/utils/TableGen/tablegen.gni")
 
 tablegen("PPCGenAsmMatcher") {
-  visibility = [ ":AsmParser" ]
+  visibility = [
+    ":AsmParser",
+    "//llvm/lib/Target/PowerPC:LLVMPowerPCCodeGen",
+  ]
   args = [ "-gen-asm-matcher" ]
   td_file = "../PPC.td"
 }

llvm/utils/gn/secondary/llvm/lib/Target/PowerPC/BUILD.gn

@@ -37,6 +37,7 @@ static_library("LLVMPowerPCCodeGen") {
     ":PPCGenFastISel",
     ":PPCGenGlobalISel",
     ":PPCGenRegisterBank",
+    "AsmParser:PPCGenAsmMatcher",
     "MCTargetDesc",
     "TargetInfo",
     "//llvm/include/llvm/Config:llvm-config",