ASoC: cs42l56: Use case range at appropriate place

The readable registers are in continuous range: 0x01 ~ 0x2e.
Use case range syntax makes the code shorter with better readability when
we have a large number of continuous switch cases.
No functional change with this patch.

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Acked-by: Brian Austin <brian.austin@cirrus.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/codecs/cs42l56.c

@@ -115,52 +115,7 @@ static const struct reg_default cs42l56_reg_defaults[] = {
 static bool cs42l56_readable_register(struct device *dev, unsigned int reg)
 {
 	switch (reg) {
-	case CS42L56_CHIP_ID_1:
-	case CS42L56_CHIP_ID_2:
-	case CS42L56_PWRCTL_1:
-	case CS42L56_PWRCTL_2:
-	case CS42L56_CLKCTL_1:
-	case CS42L56_CLKCTL_2:
-	case CS42L56_SERIAL_FMT:
-	case CS42L56_CLASSH_CTL:
-	case CS42L56_MISC_CTL:
-	case CS42L56_INT_STATUS:
-	case CS42L56_PLAYBACK_CTL:
-	case CS42L56_DSP_MUTE_CTL:
-	case CS42L56_ADCA_MIX_VOLUME:
-	case CS42L56_ADCB_MIX_VOLUME:
-	case CS42L56_PCMA_MIX_VOLUME:
-	case CS42L56_PCMB_MIX_VOLUME:
-	case CS42L56_ANAINPUT_ADV_VOLUME:
-	case CS42L56_DIGINPUT_ADV_VOLUME:
-	case CS42L56_MASTER_A_VOLUME:
-	case CS42L56_MASTER_B_VOLUME:
-	case CS42L56_BEEP_FREQ_ONTIME:
-	case CS42L56_BEEP_FREQ_OFFTIME:
-	case CS42L56_BEEP_TONE_CFG:
-	case CS42L56_TONE_CTL:
-	case CS42L56_CHAN_MIX_SWAP:
-	case CS42L56_AIN_REFCFG_ADC_MUX:
-	case CS42L56_HPF_CTL:
-	case CS42L56_MISC_ADC_CTL:
-	case CS42L56_GAIN_BIAS_CTL:
-	case CS42L56_PGAA_MUX_VOLUME:
-	case CS42L56_PGAB_MUX_VOLUME:
-	case CS42L56_ADCA_ATTENUATOR:
-	case CS42L56_ADCB_ATTENUATOR:
-	case CS42L56_ALC_EN_ATTACK_RATE:
-	case CS42L56_ALC_RELEASE_RATE:
-	case CS42L56_ALC_THRESHOLD:
-	case CS42L56_NOISE_GATE_CTL:
-	case CS42L56_ALC_LIM_SFT_ZC:
-	case CS42L56_AMUTE_HPLO_MUX:
-	case CS42L56_HPA_VOLUME:
-	case CS42L56_HPB_VOLUME:
-	case CS42L56_LOA_VOLUME:
-	case CS42L56_LOB_VOLUME:
-	case CS42L56_LIM_THRESHOLD_CTL:
-	case CS42L56_LIM_CTL_RELEASE_RATE:
-	case CS42L56_LIM_ATTACK_RATE:
+	case CS42L56_CHIP_ID_1 ... CS42L56_LIM_ATTACK_RATE:
 		return true;
 	default:
 		return false;