logging: Fix misspelled CONFIG_RISCV32

The conditional CONFIG_RISCV32 was misspelled in is_rodata() resulting
in the test failing all strings that are in RODATA section.
Additionally, it was using wrong section names for riscv.

Fixes #17065

Signed-off-by: David Leach <david.leach@nxp.com>
1 file changed