aco: stop using cstdint

We use stdint.h everywhere else.

Reviewed-by: Daniel Schürmann <daniel@schuermann.dev
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/25943>

src/amd/compiler/aco_ir.h

@@ -68,7 +68,7 @@ enum {
  *
  * (*) The same is applicable for VOP1 and VOPC instructions.
  */
-enum class Format : std::uint16_t {
+enum class Format : uint16_t {
    /* Pseudo Instruction Format */
    PSEUDO = 0,
    /* Scalar ALU & Control Formats */

src/amd/compiler/aco_opcodes_h.py

@@ -28,11 +28,11 @@ template = """\
 #ifndef _ACO_OPCODES_
 #define _ACO_OPCODES_
 
-#include <cstdint>
+#include <stdint.h>
 
 <% opcode_names = sorted(opcodes.keys()) %>
 
-enum class aco_opcode : std::uint16_t {
+enum class aco_opcode : uint16_t {
 % for name in opcode_names:
    ${name},
 % endfor