phb3: Remove recursive locking
phb3: Remove recursive locking

I can't quite figure what this code was trying to do, but
I don't see how it would help, phb3_read_phb_status() should
already have the right amount of locking in the caller.

Signed-off-by: Benjamin Herrenschmidt <a7089bb6e7e92505d88aaff006cbdd60cc9120b6@kernel.crashing.org>

qemu/skiboot,open-power/skiboot,cyrilbur-ibm/skiboot,apopple/skiboot,shenki/skiboot,neelegup/skiboot,mikey/skiboot,apopple/skiboot,legoater/skiboot,open-power/skiboot,legoater/skiboot,mikey/skiboot,ddstreet/skiboot,stewart-ibm/skiboot,cyrilbur-ibm/skiboot,qemu/skiboot,legoater/skiboot,open-power/skiboot,ddstreet/skiboot,open-power/skiboot,cyrilbur-ibm/skiboot,jk-ozlabs/skiboot,neelegup/skiboot,qemu/skiboot,csmart/skiboot,qemu/skiboot,legoater/skiboot,jk-ozlabs/skiboot,open-power/skiboot,legoater/skiboot,csmart/skiboot,stewart-ibm/skiboot,neelegup/skiboot,shenki/skiboot,csmart/skiboot,shenki/skiboot,ddstreet/skiboot,qemu/skiboot,stewart-ibm/skiboot,apopple/skiboot,shenki/skiboot,shenki/skiboot,jk-ozlabs/skiboot,mikey/skiboot