gpu: mali: Remove Exynos PM domain checks in debug code

gpu: mali: Remove Exynos PM domain checks in debug code

This fixes following compilation warning when Mali debug options are enabled:

  CC      drivers/gpu/arm/mali400/mali/linux/mali_osk_low_level_mem.o
drivers/gpu/arm/mali400/mali/linux/mali_osk_low_level_mem.c: In function ‘_mali_osk_mem_iowrite32_relaxed’:
drivers/gpu/arm/mali400/mali/linux/mali_osk_low_level_mem.c:436: error: ‘EXYNOS4_G3D_CONFIGURATION’ undeclared (first use in this function)
drivers/gpu/arm/mali400/mali/linux/mali_osk_low_level_mem.c:436: error: (Each undeclared identifier is reported only once
drivers/gpu/arm/mali400/mali/linux/mali_osk_low_level_mem.c:436: error: for each function it appears in.)
drivers/gpu/arm/mali400/mali/linux/mali_osk_low_level_mem.c: In function ‘_mali_osk_mem_ioread32’:
drivers/gpu/arm/mali400/mali/linux/mali_osk_low_level_mem.c:453: error: ‘EXYNOS4_G3D_CONFIGURATION’ undeclared (first use in this function)
drivers/gpu/arm/mali400/mali/linux/mali_osk_low_level_mem.c: In function ‘_mali_osk_mem_iowrite32’:
drivers/gpu/arm/mali400/mali/linux/mali_osk_low_level_mem.c:469: error: ‘EXYNOS4_G3D_CONFIGURATION’ undeclared (first use in this function)

Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>