Fix typeof calls in util.h

The typeof operator is not available when using GCC with "-std=c99".
Fix this issue by making the changes suggested by the GCC documentation:
"If you are writing a header file that must work when included in ISO C
programs, write __typeof__ instead of typeof."

Link: https://gcc.gnu.org/onlinedocs/gcc-11.3.0/gcc/Typeof.html
Signed-off-by: Balint Dobszay <balint.dobszay@arm.com>
Change-Id: Ia471e6da60fb1ef00bee9fa908e5767110b29e90
1 file changed