drm/amd/display: Fix power_helpers.c codestyle

Place define macro expression inside () in power_helpers.c file

Signed-off-by: Marcelo Mendes Spessoto Junior <marcelomspessoto@gmail.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

Author: MarceloSpessoto

drivers/gpu/drm/amd/display/modules/power/power_helpers.c

@@ -31,7 +31,7 @@
 
 #define DIV_ROUNDUP(a, b) (((a)+((b)/2))/(b))
 #define bswap16_based_on_endian(big_endian, value) \
-	(big_endian) ? cpu_to_be16(value) : cpu_to_le16(value)
+	((big_endian) ? cpu_to_be16(value) : cpu_to_le16(value))
 
 /* Possible Min Reduction config from least aggressive to most aggressive
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