prom_init.c: Enable support for new DRC device tree properties
"ibm,drc-info" and "ibm,dynamic-memory-v2" in initial handshake
between the Linux kernel and the front end processor.

[V2: Revise constant names.]
[V3: No change.]
[V4: Update comments]
[V5: Resynchronize/resubmit]
[V6: Resynchronize to latest kernel commit code]

Signed-off-by: Michael Bringmann <m...@linux.vnet.ibm.com>
---
diff -Naur linux-rhel/arch/powerpc/kernel/prom_init.c 
linux-rhel-patch/arch/powerpc/kernel/prom_init.c
--- linux-rhel/arch/powerpc/kernel/prom_init.c  2016-03-03 07:36:25.000000000 
-0600
+++ linux-rhel-patch/arch/powerpc/kernel/prom_init.c    2016-06-20 
15:59:58.016373676 -0500
@@ -695,7 +695,7 @@
        OV4_MIN_ENT_CAP,                /* minimum VP entitled capacity */
 
        /* option vector 5: PAPR/OF options */
-       VECTOR_LENGTH(21),              /* length */
+       VECTOR_LENGTH(22),              /* length */
        0,                              /* don't ignore, don't halt */
        OV5_FEAT(OV5_LPAR) | OV5_FEAT(OV5_SPLPAR) | OV5_FEAT(OV5_LARGE_PAGES) |
        OV5_FEAT(OV5_DRCONF_MEMORY) | OV5_FEAT(OV5_DONATE_DEDICATE_CPU) |
@@ -731,6 +731,7 @@
        0,                                                      /* Byte 19 */
        0,                                                      /* Byte 20 */
        OV5_FEAT(OV5_SUB_PROCESSORS),                           /* Byte 21 */
+       OV5_FEAT(OV5_DYN_MEM_V2) | OV5_FEAT(OV5_DRC_INFO),      /* Byte 22 */
 
        /* option vector 6: IBM PAPR hints */
        VECTOR_LENGTH(3),               /* length */

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