iio: pc104: Mask PC/104 drivers via the PC104 Kconfig option

PC/104 drivers should be hidden on machines which do not support PC/104
devices. This patch adds the PC104 Kconfig option as a dependency for
the relevant PC/104 device driver Kconfig options.

Cc: Jonathan Cameron <jic23@kernel.org>
Cc: Hartmut Knaack <knaack.h@gmx.de>
Cc: Lars-Peter Clausen <lars@metafoo.de>
Cc: Peter Meerwald-Stadler <pmeerw@pmeerw.net>
Signed-off-by: William Breathitt Gray <vilhelm.gray@gmail.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>

drivers/iio/adc/Kconfig

@@ -546,7 +546,7 @@ config STM32_ADC
 
 config STX104
 	tristate "Apex Embedded Systems STX104 driver"
-	depends on X86 && ISA_BUS_API
+	depends on PC104 && X86 && ISA_BUS_API
 	select GPIOLIB
 	help
 	  Say yes here to build support for the Apex Embedded Systems STX104

drivers/iio/counter/Kconfig

@@ -7,7 +7,7 @@ menu "Counters"
 
 config 104_QUAD_8
 	tristate "ACCES 104-QUAD-8 driver"
-	depends on X86 && ISA_BUS_API
+	depends on PC104 && X86 && ISA_BUS_API
 	help
 	  Say yes here to build support for the ACCES 104-QUAD-8 quadrature
 	  encoder counter/interface device family (104-QUAD-8, 104-QUAD-4).