net: ethernet: smsc: smc91x: Fix function name in kernel-doc header

Fixes the following W=1 kernel build warning(s):

 drivers/net/ethernet/smsc/smc91x.c:2200: warning: Function parameter or member 'dev' not described in 'try_toggle_control_gpio'
 drivers/net/ethernet/smsc/smc91x.c:2200: warning: Function parameter or member 'desc' not described in 'try_toggle_control_gpio'
 drivers/net/ethernet/smsc/smc91x.c:2200: warning: Function parameter or member 'name' not described in 'try_toggle_control_gpio'
 drivers/net/ethernet/smsc/smc91x.c:2200: warning: Function parameter or member 'index' not described in 'try_toggle_control_gpio'
 drivers/net/ethernet/smsc/smc91x.c:2200: warning: Function parameter or member 'value' not described in 'try_toggle_control_gpio'
 drivers/net/ethernet/smsc/smc91x.c:2200: warning: Function parameter or member 'nsdelay' not described in 'try_toggle_control_gpio'

Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>