[8u] RFR: 8152297: aarch32: macroassmbler:divide has to be able accept the same dividend and divisor

[Sergey Nazarkin]

Please review the small change to fix a couple of hotspot compiler regression tests. 

assert is just removed as it is duplicated at divide32().

- issue:     https://bugs.openjdk.java.net/browse/JDK-8152297
- webrev:  http://cr.openjdk.java.net/~snazarki/8152297/


Sergey Nazarkin