power: pm8xxx-ccadc: remove support for pm8921 v1.0 and v1.1

This ccadc module is reused in multiple pmics. It is now unnecessary
to check for 8921 versions in the driver. As a result of this change
older 8921 versions are not supported.

CRs-Fixed: 372679
Change-Id: I2114f9428e2ba1a29c2bc9caaaa75106caf1dfc3
Signed-off-by: Abhijeet Dharmapurikar <adharmap@codeaurora.org>
diff --git a/drivers/power/pm8xxx-ccadc.c b/drivers/power/pm8xxx-ccadc.c
index ef31575..861bac8 100644
--- a/drivers/power/pm8xxx-ccadc.c
+++ b/drivers/power/pm8xxx-ccadc.c
@@ -79,27 +79,10 @@
 static struct pm8xxx_ccadc_chip *the_chip;
 
 #ifdef DEBUG
-static s64 microvolt_to_ccadc_reading_v1(s64 uv)
-{
-	return div_s64(uv * CCADC_READING_RESOLUTION_D_V1,
-				CCADC_READING_RESOLUTION_N_V1);
-}
-
-static s64 microvolt_to_ccadc_reading_v2(s64 uv)
-{
-	return div_s64(uv * CCADC_READING_RESOLUTION_D_V2,
-				CCADC_READING_RESOLUTION_N_V2);
-}
-
 static s64 microvolt_to_ccadc_reading(struct pm8xxx_ccadc_chip *chip, s64 cc)
 {
-	/*
-	 * resolution (the value of a single bit) was changed after revision 2.0
-	 * for more accurate readings
-	 */
-	return (the_chip->revision < PM8XXX_REVISION_8921_2p0) ?
-				microvolt_to_ccadc_reading_v1((s64)cc) :
-				microvolt_to_ccadc_reading_v2((s64)cc);
+	return div_s64(uv * CCADC_READING_RESOLUTION_D,
+				CCADC_READING_RESOLUTION_N);
 }
 #endif