meta-ibm: Fix issue: fanx_1 can't get the correct pwm

Mihawk Every fan has two rotors but one of the rotors gets the wrong
fan pwm via REST command, so remove fanx_1 target.

Tested: Use command "curl -k -X GET https://root:0penBmc@<ip>/xyz/
	openbmc_project/sensors/fan_tach/fan0_0"
	This can show the correct pwm.

(From meta-ibm rev: 31a8e8430b5f2629249f80de7eb91b598fa6caca)

Signed-off-by: Ben Pai <Ben_Pai@wistron.com>
Change-Id: I68e40fefdc15a7580ca819084929813dae5d43a5
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>

meta-ibm/meta-witherspoon/recipes-phosphor/sensors/phosphor-hwmon/mihawk/obmc/hwmon/ahb/apb/pwm-tacho-controller@1e786000.conf

@@ -5,21 +5,15 @@ LABEL_fan4 = "fan1_1"
 LABEL_fan5 = "fan2_0"
 LABEL_fan6 = "fan2_1"
 LABEL_fan7 = "fan3_0"
-LABEL_fan8 = "fan3_1" 
+LABEL_fan8 = "fan3_1"
 LABEL_fan9 = "fan4_0"
 LABEL_fan10 = "fan4_1"
 LABEL_fan11 = "fan5_0"
 LABEL_fan12 = "fan5_1"
 
 PWM_TARGET_fan1 = "1"
-PWM_TARGET_fan2 = "1"
 PWM_TARGET_fan3 = "2"
-PWM_TARGET_fan4 = "2"
 PWM_TARGET_fan5 = "3"
-PWM_TARGET_fan6 = "3"
 PWM_TARGET_fan7 = "4"
-PWM_TARGET_fan8 = "4"
 PWM_TARGET_fan9 = "5"
-PWM_TARGET_fan10 = "5"
 PWM_TARGET_fan11 = "6"
-PWM_TARGET_fan12 = "6"