bpf: GCC requires function attributes before the declarator

bpf: GCC requires function attributes before the declarator

GCC insists in placing attributes before the declarators in function
declarations.  Now that GCC supports btf_decl_tag and therefore __tag1
and __tag2 expand to actual attributes, the compiler is complaining
about it for

  static __noinline int foo(int x __tag1 __tag2) __tag1 __tag2

progs/test_btf_decl_tag.c:36:1: error: attributes should be specified \
before the declarator in a function definition

This patch simply places the tags before the declarator.

Signed-off-by: Jose E. Marchesi <jose.marchesi@oracle.com>
Cc: david.faust@oracle.com
Cc: cupertino.miranda@oracle.com
Cc: Eduard Zingerman <eddyz87@gmail.com>
Cc: Yonghong Song <yonghong.song@linux.dev>
Link: https://lore.kernel.org/r/20260106173650.18191-3-jose.marchesi@oracle.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>