libsframe: bfd: use uint32_t for return type of sframe_calc_fre_type

Use uint32_t type alias consistently for all APIs in libsframe.

bfd/
	* elfxx-x86.c (_bfd_x86_elf_create_sframe_plt): Adjust for the
	changed return type.
libsframe/
	* sframe.c (sframe_calc_fre_type): Use uint32_t for return type.
include/
	* sframe-api.h (sframe_calc_fre_type): Likewise.
3 files changed