recipes: Drop remaining PR values from recipes

* as oe-core did in:
  https://git.openembedded.org/openembedded-core/commit/?id=d4c346e8ab

* when people are have to maintain own PRs for recipes in oe-core, they
  might add them for meta-oe recipes at the same time when upgrading
  to next LTS

Signed-off-by: Martin Jansa <martin.jansa@gmail.com>
Signed-off-by: Khem Raj <raj.khem@gmail.com>

meta-oe/recipes-bsp/cpufrequtils/cpufrequtils_008.bb

@@ -16,7 +16,6 @@ SRC_URI = "git://github.com/emagii/cpufrequtils.git;branch=master;protocol=https
 
 EXTRA_OEMAKE:append = " ${@['', 'NLS=false']['${USE_NLS}' == 'no']} "
 
-PR = "r5"
 
 S = "${WORKDIR}/git"
 

meta-oe/recipes-bsp/pcmciautils/pcmciautils_018.bb

@@ -8,7 +8,6 @@ LIC_FILES_CHKSUM = "file://COPYING;md5=94d55d512a9ba36caa9b7df079bae19f"
 DEPENDS = "udev sysfsutils flex-native bison-native"
 RDEPENDS:${PN} = "udev module-init-tools"
 
-PR = "r1"
 
 SRC_URI = "${KERNELORG_MIRROR}/linux/utils/kernel/pcmcia/${BP}.tar.xz \
            file://makefile_fix.patch \

meta-oe/recipes-bsp/pointercal/pointercal_0.0.bb

@@ -1,6 +1,5 @@
 SUMMARY = "Touchscreen calibration data"
 SECTION = "base"
-PR = "r11"
 LICENSE = "MIT"
 LIC_FILES_CHKSUM = "file://COPYING;md5=4b5fcfc87fb615860d398b5e38685edf"