Revert "ARCv2: spinlock/rwlock: Reset retry delay when starting a new spin-wait cycle"

This reverts commit b89aa12c.

The issue was fixed in hardware in HS2.1C release and there are no known
external users of affected RTL so revert the whole delayed retry series !

Signed-off-by: Vineet Gupta <vgupta@synopsys.com>