The LOADPARM value is fetched from SCP Read Info, but it's applied
only at the phase of bootmap interpretation. So let's read the LOARPARM
value and store it. Also provide a parsing function to detect numbers in
the LOADPARM which can be used during bootmap interpretation.

Remove a stray whitespace.

Initial patch from Eugene (jno) Dvurechenski.
Signed-off-by: NEugene (jno) Dvurechenski <jno@linux.vnet.ibm.com>
Signed-off-by: NFarhan Ali <alifm@linux.vnet.ibm.com>
Signed-off-by: NCornelia Huck <cornelia.huck@de.ibm.com>