hw/pcmcia: Do not register PCMCIA type if not required

If the Kconfig 'PCMCIA' value is not selected, it is pointless
to build the PCMCIA core components.

(Currently only one machine of the ARM targets requires this).

Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20210424222057.3434459-4-f4bug@amsat.org>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>

hw/pcmcia/meson.build

@@ -1,2 +1,2 @@
-softmmu_ss.add(files('pcmcia.c'))
+softmmu_ss.add(when: 'CONFIG_PCMCIA', if_true: files('pcmcia.c'))
 softmmu_ss.add(when: 'CONFIG_PXA2XX', if_true: files('pxa2xx.c'))