coresight: trbe: fix Kconfig "its" grammar

Use the possessive "its" instead of the contraction "it's"
where appropriate.
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Anshuman Khandual <anshuman.khandual@arm.com>
Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Cc: Suzuki K Poulose <suzuki.poulose@arm.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: coresight@lists.linaro.org
Cc: linux-arm-kernel@lists.infradead.org
Link: https://lore.kernel.org/r/20220715015925.12569-1-rdunlap@infradead.orgSigned-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>

drivers/hwtracing/coresight/Kconfig

@@ -193,10 +193,10 @@ config CORESIGHT_TRBE
 	depends on ARM64 && CORESIGHT_SOURCE_ETM4X
 	help
 	  This driver provides support for percpu Trace Buffer Extension (TRBE).
-	  TRBE always needs to be used along with it's corresponding percpu ETE
+	  TRBE always needs to be used along with its corresponding percpu ETE
 	  component. ETE generates trace data which is then captured with TRBE.
 	  Unlike traditional sink devices, TRBE is a CPU feature accessible via
-	  system registers. But it's explicit dependency with trace unit (ETE)
+	  system registers. But its explicit dependency with trace unit (ETE)
 	  requires it to be plugged in as a coresight sink device.
 
 	  To compile this driver as a module, choose M here: the module will be