clk: en7523: map io region in a single block

Map all clock-controller memory region in a single block.
This patch does not introduce any backward incompatibility since the dts
for EN7581 SoC is not upstream yet.

Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Link: https://lore.kernel.org/r/20241112-clk-en7581-syscon-v2-7-8ada5e394ae4@kernel.org
Signed-off-by: Stephen Boyd <sboyd@kernel.org>