staging: dwc2: remove specific fifo size constants

A generic set of FIFOSIZE_* constants is defined which applies to all
fifo size and offset registers. It is already used for both the
GNPTXFSIZ and HPTXFSIZ registers, but it applies to DPTXFSIZN as well.
Some of these also had specific constants defined. This patch removes
the specific constants and documents to use the generic constants.

Note that the removed constants weren't actually used. Instead, most of
the related code uses hardcoded masks and shifts. But given that
subsequent patches will be moving that code around and introducing the
constants in the process, this patch leaves those untouched.

Also note that the GRXFSIZ register also contains a fifo size, but
there is no corresponding start address register (it is always the first
fifo in memory), the layout of the GRXFSIZ register is different and
cannot use the same constants.

Signed-off-by: Matthijs Kooijman <matthijs@stdin.nl>
Acked-by: Paul Zimmerman <paulz@synopsys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/dwc2/hw.h

@@ -190,14 +190,7 @@
 #define GRXFSIZ				HSOTG_REG(0x024)
 
 #define GNPTXFSIZ			HSOTG_REG(0x028)
-#define GNPTXFSIZ_NP_TXF_DEP_MASK	(0xffff << 16)
-#define GNPTXFSIZ_NP_TXF_DEP_SHIFT	16
-#define GNPTXFSIZ_NP_TXF_DEP_LIMIT	0xffff
-#define GNPTXFSIZ_NP_TXF_DEP(_x)	((_x) << 16)
-#define GNPTXFSIZ_NP_TXF_ST_ADDR_MASK	(0xffff << 0)
-#define GNPTXFSIZ_NP_TXF_ST_ADDR_SHIFT	0
-#define GNPTXFSIZ_NP_TXF_ST_ADDR_LIMIT	0xffff
-#define GNPTXFSIZ_NP_TXF_ST_ADDR(_x)	((_x) << 0)
+/* Use FIFOSIZE_* constants to access this register */
 
 #define GNPTXSTS			HSOTG_REG(0x02C)
 #define GNPTXSTS_NP_TXQ_TOP_MASK		(0x7f << 24)
@@ -395,16 +388,12 @@
 #define ADPCTL_PRB_DSCHRG_SHIFT		0
 
 #define HPTXFSIZ			HSOTG_REG(0x100)
+/* Use FIFOSIZE_* constants to access this register */
 
 #define DPTXFSIZN(_a)			HSOTG_REG(0x104 + (((_a) - 1) * 4))
-#define DPTXFSIZN_DP_TXF_SIZE_MASK	(0xffff << 16)
-#define DPTXFSIZN_DP_TXF_SIZE_SHIFT	16
-#define DPTXFSIZN_DP_TXF_SIZE_GET(_v)	(((_v) >> 16) & 0xffff)
-#define DPTXFSIZN_DP_TXF_SIZE_LIMIT	0xffff
-#define DPTXFSIZN_DP_TXF_SIZE(_x)	((_x) << 16)
-#define DPTXFSIZN_DP_TXF_ST_ADDR_MASK	(0xffff << 0)
-#define DPTXFSIZN_DP_TXF_ST_ADDR_SHIFT	0
+/* Use FIFOSIZE_* constants to access this register */
 
+/* These apply to the GNPTXFSIZ, HPTXFSIZ and DPTXFSIZN registers */
 #define FIFOSIZE_DEPTH_MASK		(0xffff << 16)
 #define FIFOSIZE_DEPTH_SHIFT		16
 #define FIFOSIZE_STARTADDR_MASK		(0xffff << 0)