HackRF: extend LO ppm correction range to +/-30 (specs of AVX CX3225GB crystal: http://www.mouser.com/ds/2/40/cx3225gb_e-514151.pdf)

plugins/samplesink/hackrfoutput/hackrfoutputgui.ui

@@ -194,10 +194,10 @@
         <string>Local Oscullator ppm correction</string>
        </property>
        <property name="minimum">
-        <number>-200</number>
+        <number>-300</number>
        </property>
        <property name="maximum">
-        <number>200</number>
+        <number>300</number>
        </property>
        <property name="pageStep">
         <number>1</number>

plugins/samplesource/hackrfinput/hackrfinputgui.ui

@@ -196,10 +196,10 @@
         <string>Local Oscullator ppm correction</string>
        </property>
        <property name="minimum">
-        <number>-200</number>
+        <number>-300</number>
        </property>
        <property name="maximum">
-        <number>200</number>
+        <number>300</number>
        </property>
        <property name="pageStep">
         <number>1</number>