drm/amd/display: fix minor codestyle problems

Fixes five checkpatch warnings:

CHECK: Please don't use multiple blank lines
+
+

ERROR: Macros with complex values should be enclosed in parentheses
+#define MAX_I64 \
+       (int64_t)((1ULL << 63) - 1)

WARNING: Missing a blank line after declarations
+       struct bw_fixed res;
+       ASSERT(value < BW_FIXED_MAX_I32 && value > BW_FIXED_MIN_I32);

ERROR: that open brace { should be on the previous line
+               do
+               {

ERROR: that open brace { should be on the previous line
+                       if (remainder >= arg2_value)
+                       {
Signed-off-by: Tales Aparecida <tales.aparecida@gmail.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/dml/calcs/bw_fixed.c

@@ -25,9 +25,8 @@
 #include "dm_services.h"
 #include "bw_fixed.h"
 
-
 #define MAX_I64 \
-	(int64_t)((1ULL << 63) - 1)
+	((int64_t)((1ULL << 63) - 1))
 
 #define MIN_I64 \
 	(-MAX_I64 - 1)
@@ -49,6 +48,7 @@ static uint64_t abs_i64(int64_t arg)
 struct bw_fixed bw_int_to_fixed_nonconst(int64_t value)
 {
 	struct bw_fixed res;
+
 	ASSERT(value < BW_FIXED_MAX_I32 && value > BW_FIXED_MIN_I32);
 	res.value = value << BW_FIXED_BITS_PER_FRACTIONAL_PART;
 	return res;
@@ -78,14 +78,12 @@ struct bw_fixed bw_frc_to_fixed(int64_t numerator, int64_t denominator)
 	{
 		uint32_t i = BW_FIXED_BITS_PER_FRACTIONAL_PART;
 
-		do
-		{
+		do {
 			remainder <<= 1;
 
 			res_value <<= 1;
 
-			if (remainder >= arg2_value)
-			{
+			if (remainder >= arg2_value) {
 				res_value |= 1;
 				remainder -= arg2_value;
 			}