Kconfig: Fix the reference to the IDT77105 Phy driver in the description of...

Kconfig: Fix the reference to the IDT77105 Phy driver in the description of ATM_NICSTAR_USE_IDT77105

This should be IDT77105, not IDT77015.

Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: David S. Miller <davem@davemloft.net>