UBUNTU: SAUCE: Show 'pti' instead of 'kaiser' in /proc/cpuinfo

BugLink: https://bugs.launchpad.net/bugs/1830176

...to be consistent with later kernels.
Signed-off-by: Juerg Haefliger <juergh@canonical.com>
Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>

arch/x86/include/asm/cpufeatures.h

@@ -214,7 +214,7 @@
 #define X86_FEATURE_IBRS_ENHANCED	( 7*32+30) /* Enhanced IBRS */
 
 /* Because the ALTERNATIVE scheme is for members of the X86_FEATURE club... */
-#define X86_FEATURE_KAISER		( 7*32+31) /* CONFIG_PAGE_TABLE_ISOLATION w/o nokaiser */
+#define X86_FEATURE_KAISER		( 7*32+31) /* "pti" CONFIG_PAGE_TABLE_ISOLATION w/o nokaiser */
 
 /* Virtualization flags: Linux defined, word 8 */
 #define X86_FEATURE_TPR_SHADOW  ( 8*32+ 0) /* Intel TPR Shadow */