pwm: crc: Allow compilation as module and with COMPILE_TEST

The driver compiles just fine as a module. The parent driver's Kconfig
symbol already depends on X86 || COMPILE_TEST, so X86 can just be
dropped from the dependencies allowing compilation on other platforms
than x86.

Link: https://lore.kernel.org/r/[e-mail]
Reviewed-by: Linus Walleij <[e-mail]>
Signed-off-by: Uwe Kleine-König <[e-mail]>
Signed-off-by: Thierry Reding <[e-mail]>

drivers/pwm/Kconfig

···
 	  will be called pwm-clps711x.
 
 config PWM_CRC
-	bool "Intel Crystalcove (CRC) PWM support"
-	depends on X86 && INTEL_SOC_PMIC
+	tristate "Intel Crystalcove (CRC) PWM support"
+	depends on INTEL_SOC_PMIC
 	help
 	  Generic PWM framework driver for Crystalcove (CRC) PMIC based PWM
 	  control.

drivers/pwm/pwm-crc.c

···
 		.name = "crystal_cove_pwm",
 	},
 };
+module_platform_driver(crystalcove_pwm_driver);
 
-builtin_platform_driver(crystalcove_pwm_driver);
+MODULE_ALIAS("platform:crystal_cove_pwm");
+MODULE_DESCRIPTION("Intel Crystalcove (CRC) PWM support");
+MODULE_LICENSE("GPL");