bus: ti-sysc: Remove excess struct member 'disable_on_idle' description

When built with W=1, the driver throws the following warning:

../drivers/bus/ti-sysc.c:169: warning: Excess struct member
'disable_on_idle' description in 'sysc'

Fix it by removing the excess description.

Signed-off-by: Dhruva Gole <d-gole@ti.com>
Reviewed-by: Roger Quadros <rogerq@kernel.org>
Link: https://lore.kernel.org/r/20240805101118.427133-1-d-gole@ti.com


Signed-off-by: Kevin Hilman <khilman@baylibre.com>