[h8300] Fix ambiguous .md attribute uses

This patch is part of a series that fixes ambiguous attribute
uses in .md files, i.e. cases in which attributes didn't use
<ITER:ATTR> to specify an iterator, and in which <ATTR> could
have different values depending on the iterator chosen.

No behavioural change -- produces the same code as before.

2019-07-06  Richard Sandiford  <richard.sandiford@arm.com>

gcc/
	* config/h8300/h8300.md (*push1_h8300hs_<mode>): Explicitly
	specify the mode iterator referenced by <mode>, giving...
	(*push1_h8300hs_<QHI:mode>): ...this.

From-SVN: r273160

gcc/ChangeLog

 2019-07-06  Richard Sandiford  <richard.sandiford@arm.com>
 
+	* config/h8300/h8300.md (*push1_h8300hs_<mode>): Explicitly
+	specify the mode iterator referenced by <mode>, giving...
+	(*push1_h8300hs_<QHI:mode>): ...this.
+
+2019-07-06  Richard Sandiford  <richard.sandiford@arm.com>
+
 	* config/gcn/gcn-valu.md
 	(vcond<VEC_1REG_MODE:mode><VEC_1REG_ALT:mode>): Use
 	gen_vec_cmp<VEC_1REG_ALT:mode>di rather than (implicitly)

gcc/config/h8300/h8300.md

@@ -728,7 +728,7 @@
   "mov.w\\t%T0,@-r7"
   [(set_attr "length" "2")])
 
-(define_insn "*push1_h8300hs_<mode>"
+(define_insn "*push1_h8300hs_<QHI:mode>"
   [(set (mem:QHI
 	(pre_modify:P
 	  (reg:P SP_REG)