memory: omap-gpmc: Silence W=1 kerneldoc warnings

memory: omap-gpmc: Silence W=1 kerneldoc warnings

Recent W=1 builds print kerneldoc warnings, even though a correct
kerneldoc is there:

  Warning: drivers/memory/omap-gpmc.c:441 Excess function parameter 'cs' description in 'get_gpmc_timing_reg'

Drop additional inline comments for arguments to fix that.  They are
anyway not that useful.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Link: https://patch.msgid.link/20260520111630.89365-2-krzysztof.kozlowski@oss.qualcomm.com
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>