ALSA: pci/oxygen/xonar_wm87x6: remove always true condition

Fix W=1 warnings:

sound/pci/oxygen/xonar_wm87x6.c: In function ‘wm8776_write’:
sound/pci/oxygen/xonar_wm87x6.c:119:11: warning: comparison of
unsigned expression >= 0 is always true [-Wtype-limits]
119 | if (reg >= WM8776_HPLVOL && reg <= WM8776_DACMASTER)
| ^~
sound/pci/oxygen/xonar_wm87x6.c: In function ‘wm8766_write’:
sound/pci/oxygen/xonar_wm87x6.c:147:12: warning: comparison of
unsigned expression >= 0 is always true [-Wtype-limits]
147 | if ((reg >= WM8766_LDA1 && reg <= WM8766_RDA1) ||
| ^~

Signed-off-by: Pierre-Louis Bossart <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Takashi Iwai <[e-mail]>

sound/pci/oxygen/xonar_wm87x6.c

···
 	else
 		wm8776_write_i2c(chip, reg, value);
 	if (reg < ARRAY_SIZE(data->wm8776_regs)) {
-		if (reg >= WM8776_HPLVOL && reg <= WM8776_DACMASTER)
+		/* reg >= WM8776_HPLVOL is always true */
+		if (reg <= WM8776_DACMASTER)
 			value &= ~WM8776_UPDATE;
 		data->wm8776_regs[reg] = value;
 	}
···
 			 OXYGEN_SPI_CEN_LATCH_CLOCK_LO,
 			 (reg << 9) | value);
 	if (reg < ARRAY_SIZE(data->wm8766_regs)) {
-		if ((reg >= WM8766_LDA1 && reg <= WM8766_RDA1) ||
+		/* reg >= WM8766_LDA1 is always true */
+		if (reg <= WM8766_RDA1 ||
 		    (reg >= WM8766_LDA2 && reg <= WM8766_MASTDA))
 			value &= ~WM8766_UPDATE;
 		data->wm8766_regs[reg] = value;