The function platform_get_irq() can log an error already.  Thus omit a
redundant message for the exception handling in the calling function.

This issue was detected by using the Coccinelle software.
Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Link: https://lore.kernel.org/r/eb92fcfb-6181-1f9d-2601-61e5231bd892@web.deSigned-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>