powerpc/pseries/ras: Delete a redundant condition branch

The statement of the last "if (xxx)" branch is the same as the "else"
branch. Delete it to simplify code.

No functional change.
Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20210510131924.3907-1-thunder.leizhen@huawei.com

arch/powerpc/platforms/pseries/ras.c

@@ -593,8 +593,6 @@ static int mce_handle_err_virtmode(struct pt_regs *regs,
 		mce_err.severity = MCE_SEV_SEVERE;
 	else if (severity == RTAS_SEVERITY_ERROR)
 		mce_err.severity = MCE_SEV_SEVERE;
-	else if (severity == RTAS_SEVERITY_FATAL)
-		mce_err.severity = MCE_SEV_FATAL;
 	else
 		mce_err.severity = MCE_SEV_FATAL;