drm/amd/pm/powerplay/hwmgr/ppevvmath: Place variable declaration under same clause as its use

Fixes the following W=1 kernel build warning(s):

 drivers/gpu/drm/amd/amdgpu/../pm/powerplay/hwmgr/ppevvmath.h: In function ‘fMultiply’:
 drivers/gpu/drm/amd/amdgpu/../pm/powerplay/hwmgr/ppevvmath.h:336:22: warning: variable ‘Y_LessThanOne’ set but not used [-Wunused-but-set-variable]
 drivers/gpu/drm/amd/amdgpu/../pm/powerplay/hwmgr/ppevvmath.h:336:7: warning: variable ‘X_LessThanOne’ set but not used [-Wunused-but-set-variable]

Cc: Evan Quan <evan.quan@amd.com>
Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: "Christian König" <christian.koenig@amd.com>
Cc: David Airlie <airlied@linux.ie>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: amd-gfx@lists.freedesktop.org
Cc: dri-devel@lists.freedesktop.org
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/pm/powerplay/hwmgr/ppevvmath.h

@@ -333,14 +333,14 @@ static fInt fMultiply (fInt X, fInt Y) /* Uses 64-bit integers (int64_t) */
 {
 	fInt Product;
 	int64_t tempProduct;
+
+	/*The following is for a very specific common case: Non-zero number with ONLY fractional portion*/
+	/* TEMPORARILY DISABLED - CAN BE USED TO IMPROVE PRECISION
 	bool X_LessThanOne, Y_LessThanOne;
 
 	X_LessThanOne = (X.partial.real == 0 && X.partial.decimal != 0 && X.full >= 0);
 	Y_LessThanOne = (Y.partial.real == 0 && Y.partial.decimal != 0 && Y.full >= 0);
 
-	/*The following is for a very specific common case: Non-zero number with ONLY fractional portion*/
-	/* TEMPORARILY DISABLED - CAN BE USED TO IMPROVE PRECISION
-
 	if (X_LessThanOne && Y_LessThanOne) {
 		Product.full = X.full * Y.full;
 		return Product