perf: starfive: Only allow COMPILE_TEST for 64-bit architectures

The kbuild robot exploded while wasting its time building the Starfive
PMU driver for the 32-bit PA-RISC and Hexagon architectures.

Adjust the Kconfig dependencies so that COMPILE_TEST is only applicable
for 64-bit architectures (which implement writeq()).
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Will Deacon <will@kernel.org>

drivers/perf/Kconfig

@@ -87,7 +87,7 @@ config RISCV_PMU_SBI
 	  filtering, counter configuration.
 
 config STARFIVE_STARLINK_PMU
-	depends on ARCH_STARFIVE || COMPILE_TEST
+	depends on ARCH_STARFIVE || (COMPILE_TEST && 64BIT)
 	bool "StarFive StarLink PMU"
 	help
 	   Provide support for StarLink Performance Monitor Unit.