isdn: hisax: Drop duplicate Kconfig entry

There are 2 HISAX_AVM_A1_PCMCIA Kconfig entries. The kbuild system
ignores the second one, and apparently nobody noticed the problem so
far, so let's remove that second entry.

Signed-off-by: Jean Delvare <[e-mail]>
Cc: Karsten Keil <[e-mail]>
Signed-off-by: David S. Miller <[e-mail]>

drivers/isdn/hisax/Kconfig

···
 	  (the latter also needs you to select "ISA Plug and Play support"
 	  from the menu "Plug and Play configuration")
 
-config HISAX_AVM_A1_PCMCIA
-	bool
-	depends on HISAX_AVM_A1_CS
-	default y
-
 endif
 
 endmenu