Removed trailing spaces in the most relevant files

Command used for the job:
egrep -rl ' $' --include *.c --include *.h --include  *.s --include  *.inc --include  *.txt *  | xargs sed -i 's/\s\+$//g'

Credits to Grant Murphy from Stack Overflow.

src/palette_util.c

@@ -247,7 +247,7 @@ int InitPulseBlendPaletteSettings(struct PulseBlend *pulseBlend, const struct Pu
 
     if (pulseBlendPalette == NULL)
         return 0xFF;
-    
+
     pulseBlendPalette->blendCoeff = 0;
     pulseBlendPalette->fadeDirection = 0;
     pulseBlendPalette->available = 1;
@@ -322,7 +322,7 @@ void MarkUsedPulseBlendPalettes(struct PulseBlend *pulseBlend, u16 pulseBlendPal
                 pulseBlend->usedPulseBlendPalettes |= 1 << i;
             }
         }
-    }    
+    }
 }
 
 void UnmarkUsedPulseBlendPalettes(struct PulseBlend *pulseBlend, u16 pulseBlendPaletteSelector, u8 multiSelection)
@@ -423,7 +423,7 @@ void UpdatePulseBlend(struct PulseBlend *pulseBlend)
                             pulseBlendPalette->blendCoeff = 0;
                         else
                             pulseBlendPalette->blendCoeff = pulseBlendPalette->pulseBlendSettings.maxBlendCoeff & 0xF;
-                        
+
                         pulseBlendPalette->fadeDirection ^= 1;
                         pulseBlendPalette->fadeCycleCounter++;
                         break;