x86/ldt: Further fix FPU emulation

The previous fix confused a selector with a segment prefix. Fix it.

Compile-tested only.

Cc: [e-mail]
Cc: Juergen Gross <[e-mail]>
Reported-by: Linus Torvalds <[e-mail]>
Fixes: 4809146b86c3 ("x86/ldt: Correct FPU emulation access to LDT")
Signed-off-by: Andy Lutomirski <[e-mail]>
Signed-off-by: Linus Torvalds <[e-mail]>

arch/x86/math-emu/get_address.c

···
 		addr->selector = PM_REG_(segment);
 	}
 
-	descriptor = FPU_get_ldt_descriptor(segment);
+	descriptor = FPU_get_ldt_descriptor(addr->selector);
 	base_address = SEG_BASE_ADDR(descriptor);
 	address = base_address + offset;
 	limit = base_address