clk: at91: drop unused at91sam9g45_pcr_layout

The at91sam9g45_pcr_layout is not used so drop it to fix build warning:

  drivers/clk/at91/at91sam9g45.c:49:36: warning:
    'at91sam9g45_pcr_layout' defined but not used [-Wunused-const-variable=]

Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Acked-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/20200916161740.14173-1-krzk@kernel.org


Signed-off-by: Stephen Boyd <sboyd@kernel.org>