In startHost, don't set bit 2 in scratch reg 8

This was keeping hostboot from using some default scratch
register settings.

Tested: Tested by HW team

Change-Id: I1290acbabfa785e67a6038a3aadb7ececd9e1f7a
Signed-off-by: Matt Spinler <spinler@us.ibm.com>
diff --git a/procedures/p9/start_host.cpp b/procedures/p9/start_host.cpp
index f959ce7..5e11b8b 100644
--- a/procedures/p9/start_host.cpp
+++ b/procedures/p9/start_host.cpp
@@ -83,9 +83,6 @@
     // 0 -> Side 0, 1 -> Side 1
     writeRegWithMask(master, P9_SBE_CTRL_STATUS, sbeSide, 0x00004000);
 
-    // Ensure ISTEP stepping isn't enabled
-    writeRegWithMask(master, P9_SCRATCH_REGISTER_8, 0x20000000, 0x20000000);
-
     // Start the SBE
     writeRegWithMask(master, P9_CBS_CS, 0x80000000, 0x80000000);
 }