Limit efiapi calling convention to supported arches

Supported architectures in UEFI are described here:
https://uefi.org/specs/UEFI/2.10/02_Overview.html#calling-conventions

#65815

Author: nicholasbishop

compiler/rustc_target/src/spec/mod.rs

@@ -1941,8 +1941,10 @@ impl Target {
             | PlatformIntrinsic
             | Unadjusted
             | Cdecl { .. }
-            | EfiApi
             | RustCold => true,
+            EfiApi => {
+                ["arm", "aarch64", "riscv32", "riscv64", "x86", "x86_64"].contains(&&self.arch[..])
+            }
             X86Interrupt => ["x86", "x86_64"].contains(&&self.arch[..]),
             Aapcs { .. } => "arm" == self.arch,
             CCmseNonSecureCall => ["arm", "aarch64"].contains(&&self.arch[..]),