Rename Option "NoAccel" to "Accel"

Removes the need for a double negation when forcing acceleration on.

Note that this change is backwards compatible, as the option parser
automagically handles the 'No' prefix.

(ported from radeon commit cc615d06db0332fc6e673b55632bcc7bf957b44b)
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>

man/amdgpu.man

@@ -44,12 +44,11 @@ are supported:
 Selects software cursor.  The default is
 .B off.
 .TP
-.BI "Option \*qNoAccel\*q \*q" boolean \*q
+.BI "Option \*qAccel\*q \*q" boolean \*q
 Enables or disables all hardware acceleration.
 .br
-The default is to
-.B enable
-hardware acceleration.
+The default is
+.B on.
 
 .TP
 .BI "Option \*qZaphodHeads\*q \*q" string \*q

src/amdgpu_drv.h

@@ -133,7 +133,7 @@ struct _SyncFence;
 #endif
 
 typedef enum {
-	OPTION_NOACCEL,
+	OPTION_ACCEL,
 	OPTION_SW_CURSOR,
 	OPTION_PAGE_FLIP,
 #ifdef RENDER

src/amdgpu_kms.c

@@ -60,7 +60,7 @@ extern SymTabRec AMDGPUChipsets[];
 static Bool amdgpu_setup_kernel_mem(ScreenPtr pScreen);
 
 const OptionInfoRec AMDGPUOptions_KMS[] = {
-	{OPTION_NOACCEL, "NoAccel", OPTV_BOOLEAN, {0}, FALSE},
+	{OPTION_ACCEL, "Accel", OPTV_BOOLEAN, {0}, FALSE},
 	{OPTION_SW_CURSOR, "SWcursor", OPTV_BOOLEAN, {0}, FALSE},
 	{OPTION_PAGE_FLIP, "EnablePageFlip", OPTV_BOOLEAN, {0}, FALSE},
 	{OPTION_SUBPIXEL_ORDER, "SubPixelOrder", OPTV_ANYSTR, {0}, FALSE},
@@ -562,7 +562,7 @@ static Bool AMDGPUPreInitAccel_KMS(ScrnInfoPtr pScrn)
 {
 	AMDGPUInfoPtr info = AMDGPUPTR(pScrn);
 
-	if (!xf86ReturnOptValBool(info->Options, OPTION_NOACCEL, false)) {
+	if (xf86ReturnOptValBool(info->Options, OPTION_ACCEL, TRUE)) {
 		AMDGPUEntPtr pAMDGPUEnt = AMDGPUEntPriv(pScrn);
 		Bool use_glamor = TRUE;
 #ifdef HAVE_GBM_BO_USE_LINEAR