clk: zynqmp: make bestdiv unsigned

[ Upstream commit d3954b51 ]

Divisor is always positive make it u32 *.
Also the arguments passed are currently of u32 pointers.

Signed-off-by: Shubhrajyoti Datta <shubhrajyoti.datta@amd.com>
Link: https://lore.kernel.org/r/20220818113153.14431-1-shubhrajyoti.datta@amd.com


Signed-off-by: Stephen Boyd <sboyd@kernel.org>
Stable-dep-of: 1fe15be1 ("drivers: clk: zynqmp: update divider round rate logic")
Signed-off-by: Sasha Levin <sashal@kernel.org>